If you perform a Google search while logged in, all search keywords will also be linked.
Regarding app usage, Apple and Google understand the types of apps installed on the device and how long each app is used.
Even if they do not know the data inside the app, usage frequency and operation status can be sufficiently monitored.
Furthermore, regarding website browsing history, through Google Analytics, which is introduced on most sites, browsing pages, stay time, and transition destinations are collected.
If you perform a Google search while logged in, all search keywords are also linked.
