Okay kiddo, there was a website called Roommates.com where people could find roommates to live with. The website would show you potential roommates and you could pick the ones you liked.
However, some people complained to the Fair Housing Council of San Fernando Valley that the website was not being fair to everyone. You see, in the United States, there are laws to make sure people aren't discriminated against when looking for a place to live. This means that people can't be discriminated against because of their race, religion, or gender, for example.
The Fair Housing Council of San Fernando Valley decided to sue Roommates.com because they were allowing users to say things like "I don't want to live with someone who is gay" or "I only want to live with Christians." These were things that could be considered discrimination, and the Fair Housing Council wanted to make sure everyone using the website was treated fairly.
In the end, the court said that Roommates.com couldn't let people say these kinds of things on their website because it was against the law. Roommates.com had to change the way their website worked to make sure everyone was treated equally.
So, the lesson here is that it's important to treat everyone fairly and not discriminate against people because of who they are. We all deserve to be treated with respect and kindness, no matter what.