what’s digital footprint and threatmodel?

, from what i understand a digital footprint is a bunch of information connected to your name.

i have 4 google accounts that are connected with the same phone number, only 1 has my real name - (rip)

if i’m not misunderstanding a digital footprint collects everything you do, from searching in google/chrome, posting content and creating accounts (reddit for example), is that right?

if i’m right about this then how do i delete or cut the thread that connects …

accounts chrome digital digital footprint google google accounts information name phone phone number privacy rip understand