The shore area is exactly what it sounds like: It's the area along the edge of a body of water, so it's another way to talk about the shore.

The readings for this word are both kun'yomi readings. You haven't learned this reading for 辺 yet, so here's a mnemonic to help you:

You know you've come to the shore when you're greeted by the sound of bells (べ). You know, buoy bells, ship bells, maybe even some bells ringing at a nearby harbor. Close your eyes and listen to them echoing across the waves… This is the sound of the shore, no doubt about it.