The correct answer to this open question is the following.
The examples from my life regarding three ways that groups affect people through social facilitation, social loafing, and deindividuation, are the following.
Social facilitation.
This term means that people perform much better in front of strange people than when doing it in front of friends or acquaintances.
I remember a time when playing football, our practices were good, nothing to be proud of. But when game day came, our performance was much better.
Social loafing.
In this case, a member of a group is lazy and does not work as hard as the other members of the group. My example is from that football team. There were players that worked harder than others. Some players were lazy and did not give enough effort while others took extra time in preparation.
Deindividuation.
This situation occurs when you lose your personality when becoming a member of a large group.
When I was a player in that above-mention football team, I had to sacrifice parts of my personality as a team member. I had to obey certain rules I may like or dislike, and follow the leaders for the benefit of the group, although sometimes I did not agree with what they said.