Memory and Forgetting

hey guys i really need your help because i have to write an 1/2 page description on:

Explain how you remember, and techniques for remembering. (this doesnt refer to you, its in general why we remember)

Explain how/why we don't always retain information in memory

I dont know what to write about both of these..i googled it but it didnt really help me so i was wondering if you guys could asnwer my questions and try to help me get started..it will be a big appreciate😳

Please guys help me...i really need help😳