how to elo boost safe?

i am interested in elo boost but worried whether it's safe.

how does elo boosting work?
if someone from other continent log in with my account info,
wouldn't that be flagged ??

please someone who is elo boosting, or have knowledge about this issue
answer me,

Thanks in advance

i think i am in the wrong place,
please move or delete post , ;;
can't find delete button :(

Most Elo Booster from a other continent are using a VPN that is near you location.

To make it more save, i would give you the advice to Duo-Que Boost, there shouldnt be any risk of getting detected by riot or banned