nostr:npub19fywau9ff6pjmjek7k4kukgdcdf7w4chne57upj5s7y87gk7v27qx7n5nv topics doesn't track your history, it tracks the classification of the sites you visit against a relatively small set of categories. This is a sunset of the categories used by the ad agencies.  If you view 25 pages across 3 different movie criticism sites, there might  be 25 pips in the "movies".  Very high level.  There is no direct tracking of your history.