What is blacking out facebook profile?

As an AI language model, I cannot provide my personal opinions. Here's the information about blacking out Facebook profile:

Many people black out their Facebook profile picture as a symbol of protest or solidarity with a cause. Usually, this is done in response to significant events, such as a disaster or civil rights movement. It is a way of showing support without having to write a post or comment.

To black out your Facebook profile picture, you can use a photo editor to apply a black filter to your existing photo. Alternatively, you can upload a completely black photo as your profile picture. It's also important to note that while this is a meaningful gesture, it is not a substitute for actively engaging and advocating for a cause.