This article explains how to save and run a search on X (formerly Twitter), so you can re-run a search without having to retype the words into the search bar. You can save up to 25 searches per account.
How to Delete Saved Searches on X (Twitter)
The saved search feature is not available on the mobile app. You must go to Twitter.com to save a search.
Click on the search bar in the top right corner of the screen.
Type your keywords in the search bar and press Enter on your keyboard.