Dogme95 was a special group that had the idea of making movies in a very different way than normal people. They wanted to stop using fancy tricks like special effects and big Hollywood actors. Their idea was to make movies that felt more real, like you were watching a story happen right in front of you.
So, they made a bunch of rules that said how they could make their movies. These rules included things like only using natural lighting and not adding any music that wasn't already happening in the scene. They also said that they couldn't use any props that weren't already in the location they were filming in.
Basically, Dogme95 was a group of people who wanted to create films in a very raw and authentic way by using only the most essential elements.