Do I need to switch on each option after installing AI Search Optimization?

No. Every option is treated as on until you switch it off, so the plugin starts working as soon as it is active.

On a new install the tick boxes in Plugins → AI Search Optimization can look unticked even though the options are working. To turn one off, or just to make the page match your store:

1. Tick every option.
2. Untick the ones you do not want.
3. Optionally fill in llms.txt — one line describing your store.
4. Click Save Changes.

The options are Rating stars in search results (AggregateRating), FAQ answers in search results (FAQPage), Store entity graph (Organization + WebSite), Breadcrumbs in search results, Blog article markup (BlogPosting), Serve llms.txt for AI crawlers and Quick-answer blocks on products and pages.