Your digital footprint is essentially the permanent trail of data you leave...

https://juliet-wiki.win/index.php/Does_Twitter_Share_Add_Tracking_to_the_Link%3F_A_Web_Producer%E2%80%99s_Guide_to_Your_Digital_Footprint

Your digital footprint is essentially the permanent trail of data you leave behind whenever you browse, shop, or use apps. Advertisers use these crumbs to build profiles and follow you across the web