# Bridge IndexNow > Announce changed pages instead of waiting to be revisited. See what automatic submission covers, which engines take part, and why Google is not one. Bridge IndexNow is the IndexNow submission mechanism of Bridge CDN, not a separate product. Automatic submission covers discovered and changed URLs only; enabling it imports no history; full-site submission is manual. Bing and Yandex receive submissions by default; Seznam, Naver and Yep take part when enabled. Google does not participate in IndexNow and receives nothing from it. Key topics: How it works, Submission modes, Engines, Setup, Troubleshooting, Comparisons, Tools. ## Main Documentation - [About Bridge IndexNow](https://bridge-indexnow.com/about.txt): what this layer covers and where its boundaries are. - [Bridge IndexNow FAQ](https://bridge-indexnow.com/faq.txt): every question answered on the site, in one file. - [Bridge IndexNow for LLM, GPT, AI, and AI-Agents](https://bridge-indexnow.com/llms-instructions.txt): what may and may not be stated about this layer. - [Bridge IndexNow full text](https://bridge-indexnow.com/llms-full.txt): every published page, in build order. ## Part of BotBridge BotBridge is the network this site belongs to: it covers the infrastructure between a visitor and a server — naming, delivery, certificates, and traffic filtering. Bridge IndexNow documents the submission layer; the product itself is Bridge CDN. - [BotBridge](https://botbridge.io/): the network. - [Bridge CDN](https://bridge-cdn.com/): the product this layer belongs to. - [Bridge DNS](https://bridge-dns.com/): the naming layer, adjacent to this one. ## Additional Resources - [Bridge IndexNow](https://bridge-indexnow.com/): this site. - [Sitemap](https://bridge-indexnow.com/sitemap.xml): index of every published address. - [IndexNow engines: who takes part, and who does not](https://bridge-indexnow.com/engines/): Two engines receive submissions by default, three more when you enable them, and one large one takes part in none of it. See what that means for a publisher. - [How IndexNow works: from a change to a submission sent](https://bridge-indexnow.com/how-it-works/): A page changes, the platform notices, and a submission goes out. See each step of that sequence, why a key exists, and what acceptance does not mean. - [How to set up IndexNow: four ways to send a submission](https://bridge-indexnow.com/setup/): A submission can be sent by hand, by a content system, by the delivery layer, or by your publish process. See what each way asks of you and which one fits. - [IndexNow tools: key checks and a submission test](https://bridge-indexnow.com/tools/): Three checks around the key file and a single submission, each answering one question. What they settle, and the pages that explain the answers. - [IndexNow troubleshooting: start from what you observed](https://bridge-indexnow.com/troubleshooting/): Submissions fail in a few recognisable ways, and the most common complaint is not a failure at all. Find your symptom and what it actually indicates. - [IndexNow vs the ways you already announce pages](https://bridge-indexnow.com/vs/): Sitemaps, links and submission answer different questions about the same site. What each one actually does, and why none of them replaces another. ## What automatic submission covers - Discovered and changed URLs only; enabling it imports no history, and full-site submission is manual. - Bing and Yandex receive submissions by default, with nothing to configure. - Seznam, Naver and Yep take part when you enable them. - A key is served at /.txt on your own hostname, from the edge. ## How a submission is sent - A submission can also be made by hand, in one action, without leaving the platform. - There are three submission modes. Fallback submits each URL once and retries the next engine only on failure; Balance spreads URLs across the enabled engines, one engine per URL; All Engines submits every URL to every enabled engine, which is redundant by design. - The allowance is counted per engine rather than per site or per batch, so the mode decides how many addresses that allowance turns into. - Every submission is recorded: the address, the engine, the mode, the time, and whether the endpoint accepted it. A refusal is recorded the same way as an acceptance. ## What this does not do - Google does not participate in IndexNow and receives nothing from it. - Submission is not indexing: an engine decides on its own criteria whether to crawl, index or rank. - Announcing an entire site is a manual action, not something that happens on its own.