Low freq drift in EEG/iEEG

Hi, this is a basic question that I want to make sure my understanding is correct.
This is an SEEG signal without filtering. It’s clear that there is a drift. I wonder is this the common low-frequency drift in EEG?

This is after I did 0.1Hz high-pass filtering. We could see that there is no drift.
Is this an example of doing 0.1Hz high-pass filtering to remove low-frequency drift?