Stereotyping is to believe, think or say groups of people are the same even when they are not.
An example of stereotyping is boys have short hair. I disagree because I've seen some boys with long hair like mullet man. It is their choice.
A second example is girls braid their hair. I agree because last year at school I was in room 7 and 8 and we had shared story and girls would line up and braid/ plait each others hair but boys can braid their hair if they want too.
A final example of stereotyping is girls don't want to play football. This depends. As they get older a lot of girls play football and they are good at it. At our age there is not a lot of girls that play football.
Stereotyping can be mean in some ways and hurt in some ways too. It is not true and people might not like it. It can hurt their feelings.