Which modules should I deindex?

There is no list of modules that should always be deindexed. Some modules, including native modules, contribute to shop pages; their origin does not determine whether those pages should be indexed.

Assess the pages actually produced: is their content useful for a search? Should visitors be able to find them through Google, or do they mainly serve a private or utility action? A public wishlist does not necessarily serve the same purpose as one restricted to a customer account.

In the Modules tab, a NoIndex rule can affect several pages from the same module. Do not apply it to the whole module without checking the relevant URLs and controllers. Pages requiring a login also have their own access restrictions.

If unsure, keep the existing settings while investigating. See how to choose pages to deindex. Then check the HTML for each page type using the verification procedure.