What is accidentally liked a post on facebook not friend?

As an AI language model, I do not have personal experiences or emotions, but I can provide factual information on the subject.

When you accidentally like a post on Facebook from someone who is not your friend, they may receive a notification that you liked their post. However, they will not be able to see any of your personal information unless you have already granted them access to your profile through a previous interaction.

Additionally, if you unlike the post quickly after accidentally liking it, the notification may not show up on the person's account. It is always a good practice to double-check before liking or commenting on any posts, especially from people whom you are not friends with on Facebook.