It is normal for children to become interested in their private parts and to find out that girls parts look different than boys. She may engage in some touching behaviors. Most important is that you do not react negatively by scolding, shaming or punishing her.
You can tell her in age appropriate language some basic information about her body.
There are some children's books that too assist with this parental task.
It is also important to let her know what is a good touch and bad touch and who should and should not touch there.