The verb [ให้] means to [give]. This word can be a little tricky to use, so we will just introduce you to some basic sentences here.
1.Give a book.
ให้หนังสือ
2.Give to her.
ให้เขา
3.Give a book to her.
ให้หนังสือเขา
Do(something)for(someone)
(giver)+verb(+object)+[ให้]+(receiver)
1.I'll buy a book for you.
ซื้อหนังสือให้คุณ
2.I will go buy a book for you.
ไปซื้อหนังสือให้คุณ
Let(someone)do(something)
[ให้]+person+verb(+object)
Let him/her go buy a book.
ให้เขาไปซื้อหนังสือ