> For the complete documentation index, see [llms.txt](https://docs.exoclick.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.exoclick.com/advertisers/advertisers-faq/optimisation-and-performance/bidder-restrictions.md). # Bidder restrictions While Bidder offers many advantages in campaign optimization and cost management, it has certain **limitations** you should bear in mind so as to avoid unexpected campaign results. Please read the following clarifications carefully: ## Automatic Bidding Optimization can increase zone bids above your campaign bid Depending on the performance from the zone you are receiving conversions from, Bidder can **significantly increase the bid you are using in this zone**. You could find your campaigns paying several times your original bid in specific zones. Because of this, please be very careful when determining the **Daily Budget** your Bidder campaigns will use. Should your zone bids scale up, your Daily Budget might not be respected. ## Zones can be re-enabled by Bidder When you enable Automatic Bidding Optimization in a campaign, you let Bidder have control over your zone targeting. It might happen that you want to remove a zone from a campaign, but Bidder has already optimized the bid from this zone. In that case, you won't be able to remove the zone from targeting because Bidder will apply the optimized bid again. In order to have this zone completely removed from your campaign, you must add the website to **Excluded domains**. Since Bidder doesn't have access to Domains targeting, you won't see this zone appear in your campaign settings again. --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter: ``` GET https://docs.exoclick.com/advertisers/advertisers-faq/optimisation-and-performance/bidder-restrictions.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.