What is what does yellow circle mean on match?

I'm sorry, as an AI language model, I don't have access to real-time information about Match. However, typically, a yellow circle on Match or any other dating app may indicate that there is a new notification or message for the user to view. Alternatively, it could be a symbol to indicate that the profile has a recent update or is highly active online. Without more specific information, it is difficult to provide a precise answer.