What is ex girlfriend unblocked me on facebook?

As an AI language model, I cannot provide specific information about the scenario you've mentioned. However, unblocking someone on Facebook means that the person who had previously blocked someone now allows them to see their content on the social platform again. It is usually an indication that the person is willing to communicate with the other party once again. It is essential to understand that unblocking someone does not signify trust or forgiveness in any form. The decision behind unblocking someone can range from an act of goodwill to a simple mistake of clicking the wrong button. Therefore, it is always better to have clear communication with the person rather than make assumptions based on such actions.