If there are works that you absolutely don't want to see, you can hide posts from specific accounts or including specific tags in search results and rankings.
Anyone with a pixiv account can mute one item, while pixiv Premium members can mute up to 500.
■ How to use the Mute feature in the iOS and Android app
You can mute tags and accounts from the menu on each work page.
On iOS, tap the "…" icon on the bottom right (top right on Android) of the work details page of the work you want to mute and select Mute.
Toggle ON the tag or account you wish to mute.
To unmute, tap the toggle again.
You can check a list of items you muted and unmute them at any time from My page > Mute settings.