Bring means moving something towards the speaker or a particular destination being discussed.
- Please bring your passport.
- Can you bring some water?
- She brought her children to the party.
Take means moving something away from the speaker or to another place.
- Please take this letter to the office.
- Don’t forget to take your umbrella.
- He took the books home.
Simple guide
Bring = towards here.
Take = towards there.
The exact choice depends on the point of view and destination.