Shielding is a form of protection. We are bombarded with energy daily, and a lot of it, we don’t really want.
I recommend that beginners shield as often as possible – preferably at the top of the hour – to become well practiced at it.
I also highly recommend that everyone shield before meditation/visualization exercises, and before doing any energy work.
(music by Sara Ayers; sound effects by BristolStories: freesound.org)