# Lastmod > Lastmod (lastmod.ai) is the proof layer for SEO and AI visibility: it finds what your website should change, looks for the change on the live page, and measures what changed afterwards. Not to be confused with the sitemap element `lastmod`, which the glossary explains: https://www.lastmod.ai/en/glossary/lastmod. Measure SEO results and AI visibility. Lastmod honestly shows what your work on your website changed, with the uncertainty shown, and says what to do next. The site is in English and Dutch. Every page has the same content in both languages: the English pages start at https://www.lastmod.ai/en and the Dutch pages (Nederlands) at https://www.lastmod.ai/nl. Dutch versions of the pages below sit under /nl with the Dutch path names. ## Product - [How it works: from finding to measured result](https://www.lastmod.ai/en/how-it-works): Lastmod finds and ranks SEO work, you make the change, and Lastmod measures what happened. See what each side does at every step, and where AI is used. - [Find, do, measure, report: the product](https://www.lastmod.ai/en/product): One loop for your SEO and AI visibility: Lastmod finds what matters, sets the task, checks it is live and measures what changed. See every part. - [Find SEO opportunities on your site](https://www.lastmod.ai/en/product/opportunities): Find SEO opportunities with fixed rules, from quick wins and CTR drops to technical SEO and Core Web Vitals, and see what each one needs to be detected. - [AI visibility tracking: ChatGPT, Gemini, AI Mode](https://www.lastmod.ai/en/product/ai-visibility): Track AI visibility: Lastmod asks ChatGPT, Google AI Mode and Gemini the questions you approve and counts how often your site is named or cited, with margins. - [Tasks and the live check](https://www.lastmod.ai/en/product/tasks): Each opportunity becomes a task with what to change, where and why. Lastmod checks the live page afterwards and tells search engines through IndexNow. - [Measure the impact of SEO changes](https://www.lastmod.ai/en/product/measurement): Measure the impact of SEO changes: Lastmod compares clicks per day before and after a change, states how confident that is, and says when data is too thin. - [Monthly SEO reports with white label](https://www.lastmod.ai/en/product/reports): A monthly report per website: open work, finished tasks and measured results, with confidence stated. Your logo and your agency's name on Agency. - [Site audit without a score](https://www.lastmod.ai/en/product/site-audit): Lastmod audits every page against 52 fixed checks, orders each finding by severity and never adds them up to a score. A finding links to the task that fixes it. - [Integrations: Search Console, GA4, IndexNow](https://www.lastmod.ai/en/integrations): Lastmod reads Google Search Console and GA4, crawls your site and tells Bing and other IndexNow search engines when you finish a task. - [Demo: see it work on example data](https://www.lastmod.ai/en/demo): Click through example tasks, measured results and an overview for a made-up bakery site. The data is invented; the rules are Lastmod's real ones. - [Pricing: plans from €49 a month](https://www.lastmod.ai/en/pricing): Public pricing for Lastmod: Starter €49, Pro €149 and Agency €499 a month, with every limit listed. The free trial runs 30 days, no credit card. ## Who it is for - [SEO client reporting for agencies](https://www.lastmod.ai/en/for/agencies): Manage client sites in one account: 10 websites included, a client switcher and monthly reports with your own logo and colours. - [Show your SEO impact: what your work changed](https://www.lastmod.ai/en/for/in-house): Ranked SEO tasks with the reasoning behind each, and a measured result after each change to a page with enough traffic. For marketers who do SEO on the side. - [SEO for freelancers and small sites](https://www.lastmod.ai/en/for/freelancers): Lastmod ranks what to fix on your own site and measures what changed, with the uncertainty shown. Built for one site or a few, without an SEO specialist. - [SEO for small business marketing teams](https://www.lastmod.ai/en/for/small-business): For a marketing team without an SEO specialist: Lastmod ranks the work, checks it is done and shows your director what it changed, with the uncertainty shown. - [Webshop SEO: product pages and indexing](https://www.lastmod.ai/en/for/webshops): For webshops with many product and category pages: Lastmod finds indexing, duplicate content and structured data problems, ranks them and measures the fix. ## Developers and AI assistants - [API, webhooks and MCP for developers](https://www.lastmod.ai/en/developers): A read-only API, signed webhooks and an MCP server for your Lastmod websites, opportunities, tasks and results. For scripts, dashboards and AI assistants. - [Connect an AI assistant via MCP](https://www.lastmod.ai/en/connect-ai-assistant): Connect Claude, ChatGPT, Claude Code or Cursor to Lastmod and ask about your websites, opportunities, tasks and results. Read-only access. ## Trust and company - [About: who builds it and why](https://www.lastmod.ai/en/about): Who builds Lastmod, the principles every recommendation follows, where the product stands today and how to reach us. - [Security and data: EU hosting, read-only access](https://www.lastmod.ai/en/security): How Lastmod handles your data: EU storage, read-only Google access, domains you prove access to, separated organisations, and what we don't have yet. - [FAQ: answers before you start](https://www.lastmod.ai/en/faq): Answers to the questions people ask before trying Lastmod: how it works, what it needs, what it costs, how it handles your data and what it does not do. - [Changelog: what has been built](https://www.lastmod.ai/en/changelog): What Lastmod can do today, newest first, each with the date it was added. Only changes you can notice, in plain words. ## Use cases - [Missing canonical tag: how to find and fix it](https://www.lastmod.ai/en/use-cases/missing-canonical-tag): A page with no canonical tag leaves search engines to choose the main URL. See how Lastmod finds these pages, what to add, and how the fix is measured. - [Duplicate title tags: how to find and fix them](https://www.lastmod.ai/en/use-cases/duplicate-title-tags): When two indexable pages share one title, searchers and search engines cannot tell them apart. See how Lastmod finds them and how a new title is measured. - [Missing meta description: how to find and fix it](https://www.lastmod.ai/en/use-cases/missing-meta-description): A missing meta description leaves the snippet under your result to chance. See how Lastmod finds these pages, what to write, and how the change is measured. - [Pages almost on page one: find the quick wins](https://www.lastmod.ai/en/use-cases/pages-close-to-page-one): Pages at position 4 to 10 that get seen but rarely clicked are the first candidates for a better title or description. See the rule and how it is measured. - [Clicks falling but ranking holding: what to check](https://www.lastmod.ai/en/use-cases/ctr-dropping-position-stable): When impressions and position hold but click-through falls, that points more to the results page than to your ranking. What Lastmod reports, and what to check. - [Broken internal links: how to find and fix them](https://www.lastmod.ai/en/use-cases/broken-internal-links): An internal link to an error page leaves visitors and crawlers at a dead end. See how Lastmod finds them, how to fix them and how it is measured. ## Guides - [How to measure SEO results after a change](https://www.lastmod.ai/en/guides/measure-seo-results): How to measure what an SEO change did: set a baseline, pick the right metric, wait long enough, rule out other causes and say how sure you are. - [SEO reporting for clients that shows your work](https://www.lastmod.ai/en/guides/seo-client-reporting): How to write an SEO report a client reads: what to include, how to show what your work changed, and how to report a flat or falling month honestly. - [Clicks falling but position the same: why?](https://www.lastmod.ai/en/guides/clicks-down-position-stable): Search Console clicks are down while your average position holds. The usual causes, how to tell them apart in the data, and what to do about each. - [How to measure AI visibility in ChatGPT](https://www.lastmod.ai/en/guides/measure-ai-visibility): How to measure whether ChatGPT, Google AI Mode and Gemini name your website: pick the questions, count the answers, and read the numbers with their limits. - [robots.txt for AI crawlers: what to allow](https://www.lastmod.ai/en/guides/robots-txt-ai-crawlers): Which AI crawlers exist, what each kind does, and how to allow or block them in robots.txt: search bots, training bots and user-triggered fetchers. - [llms.txt explained: do you need one?](https://www.lastmod.ai/en/guides/llms-txt-explained): What llms.txt is, what goes in it, how it differs from robots.txt and a sitemap, and how little evidence there is that AI assistants use it today. ## Free tools - [Free robots.txt checker](https://www.lastmod.ai/en/free-tools/robots-txt-checker): Check whether your robots.txt blocks Googlebot or AI crawlers. Free and without an account: enter your domain and see what a search engine may read. - [AI crawler checker: is GPTBot blocked?](https://www.lastmod.ai/en/free-tools/ai-crawler-checker): See which AI crawlers your robots.txt blocks or allows, such as GPTBot, OAI-SearchBot and ClaudeBot. Free, no account: enter your domain. - [Free sitemap checker](https://www.lastmod.ai/en/free-tools/sitemap-checker): Check whether search engines can find and read your XML sitemap. Free and without an account: enter your domain and see what the check found. - [Free meta tags checker: title and description](https://www.lastmod.ai/en/free-tools/meta-tags-checker): Check the title, meta description, canonical and noindex of your homepage. Free and without an account: enter your domain and see what is missing. ## SEO glossary - [What is a canonical tag?](https://www.lastmod.ai/en/glossary/canonical-tag): A canonical tag names the main URL of a page that can be reached on several addresses. What it does, what it does not guarantee, and how Lastmod checks it. - [What is a title tag?](https://www.lastmod.ai/en/glossary/title-tag): The title tag is the headline of a page in search results. What makes a good one, why two pages should not share one, and which checks Lastmod runs on it. - [What is a meta description?](https://www.lastmod.ai/en/glossary/meta-description): A meta description is the short text offered under your result in search. Whether it affects ranking, when Google rewrites it, and how Lastmod checks it. - [What is click-through rate (CTR)?](https://www.lastmod.ai/en/glossary/click-through-rate): Click-through rate is the share of searchers who open your result after seeing it. How it is calculated, why it depends on position, and how Lastmod uses it. - [What is an SEO quick win?](https://www.lastmod.ai/en/glossary/quick-win): A quick win is a page that ranks and gets seen but is rarely clicked. The rule Lastmod uses to find them, and why a rewrite is a test, not a promise. - [What is CTR decoupling?](https://www.lastmod.ai/en/glossary/ctr-decoupling): CTR decoupling is when clicks fall while impressions and position hold. The pattern Lastmod looks for, what can cause it, and why it never names a cause. - [What is a baseline window?](https://www.lastmod.ai/en/glossary/baseline-window): The baseline window is the period before a change that you compare against. How long Lastmod's is, what it leaves out, and why it uses daily averages. - [What is a minimum-traffic gate?](https://www.lastmod.ai/en/glossary/minimum-traffic-gate): A minimum-traffic gate refuses to calculate a result when traffic is too low to trust. Lastmod's thresholds, and why it says “not enough data”. - [What is result confidence?](https://www.lastmod.ai/en/glossary/confidence-band): Result confidence says how far to lean on a measured result, from traffic and change size. Lastmod's four levels, and why it is no significance test. - [What is a confounded result?](https://www.lastmod.ai/en/glossary/confounded-result): A confounded result is one that something else could explain. What Lastmod flags, why such results are shown but not counted, and what to do. - [What are Core Web Vitals?](https://www.lastmod.ai/en/glossary/core-web-vitals): Core Web Vitals are Google's three measures of loading, response and stability: LCP, INP and CLS. How much they matter, and what Lastmod checks. - [What is an XML sitemap?](https://www.lastmod.ai/en/glossary/xml-sitemap): An XML sitemap is a file that lists the pages of your site for search engines. What it is for, what it does not do, and why Lastmod's technical checks need it. - [What is lastmod in a sitemap?](https://www.lastmod.ai/en/glossary/lastmod): Lastmod is the sitemap element that states when a page last changed. What search engines do with it, and how it relates to the product named Lastmod. - [What is IndexNow?](https://www.lastmod.ai/en/glossary/indexnow): IndexNow lets a site tell participating search engines that a page changed. Which engines use it, that Google does not, and how Lastmod uses it. - [What is a Google AI Overview?](https://www.lastmod.ai/en/glossary/ai-overview): An AI Overview is the AI-written summary Google shows above some results, with links to its sources. What it is and how Lastmod flags missing citations. - [What is Google AI Mode?](https://www.lastmod.ai/en/glossary/ai-mode): AI Mode is Google's conversational way of searching: an AI writes the answer and links to sources. What it is and how Lastmod counts mentions of your site. - [What is GEO (generative engine optimization)?](https://www.lastmod.ai/en/glossary/generative-engine-optimization): GEO is the work of making a site easy for AI assistants to find, read and cite. What it covers, what is still unproven, and how Lastmod measures AI visibility. - [What is keyword cannibalization?](https://www.lastmod.ai/en/glossary/keyword-cannibalization): Keyword cannibalization is when several pages of one site compete for the same search terms. How to spot it, when it is a problem, and how Lastmod flags it. - [What is a Wilson interval?](https://www.lastmod.ai/en/glossary/wilson-interval): A Wilson interval is the range a percentage could really lie in, given a small sample. Why Lastmod shows it with AI visibility instead of a bare percentage. - [What is noindex?](https://www.lastmod.ai/en/glossary/noindex): Noindex is an instruction that keeps a page out of search results. How it differs from blocking in robots.txt, where it belongs, and what Lastmod checks. - [What is robots.txt?](https://www.lastmod.ai/en/glossary/robots-txt): Robots.txt is a file in the root of a site that tells crawlers which paths they may fetch. What it can and cannot do, and what Lastmod reads from it. - [What is hreflang?](https://www.lastmod.ai/en/glossary/hreflang): Hreflang links tell search engines which language or regional version of a page to show to whom. How to set them up, common mistakes, and what Lastmod flags. - [What is structured data?](https://www.lastmod.ai/en/glossary/structured-data): Structured data is markup, usually JSON-LD, that states what a page is: a product, an article, a business. What it does for search, and what Lastmod checks. - [What is crawl budget?](https://www.lastmod.ai/en/glossary/crawl-budget): Crawl budget is how many pages a search engine will fetch from your site in a given time. When it matters, which sites can ignore it, and what Lastmod flags. - [What is search intent?](https://www.lastmod.ai/en/glossary/search-intent): Search intent is what a searcher wants with a query: to learn, find a site, compare or buy. Why it matters for titles and pages, and where Lastmod stops. - [What is llms.txt?](https://www.lastmod.ai/en/glossary/llms-txt): Llms.txt is a proposed Markdown file listing a site's key pages for AI assistants. What it is, how limited the evidence is, and what Lastmod does with it. ## Comparisons - [Lastmod vs Semrush: what each is for](https://www.lastmod.ai/en/compare/semrush): Semrush is a broad marketing suite with its own search data. Lastmod ranks what to change on your site and measures it. Sourced, with where Semrush wins. - [Lastmod vs Ahrefs: what each is for](https://www.lastmod.ai/en/compare/ahrefs): Ahrefs has its own web index and keyword data. Lastmod works from your site and Search Console and measures changes. Sourced, with where Ahrefs wins. - [Lastmod vs Screaming Frog: what each is for](https://www.lastmod.ai/en/compare/screaming-frog): Screaming Frog is a desktop crawler you run yourself. Lastmod is hosted, ranks fixes and measures them. Sourced, with where Screaming Frog wins.