If you're the only one in the neighborhood who cares about this sport full of tensions and turns and you don't have to share experiences with whom, it's great to become part of a huge community where you have this thrilling sport in the first place. If you are a recreational player, feel free to add. There are a lot of people waiting for them to sign up for new potential opponents and will be able to invite you to a match or invite you to tournaments they organise.
What's happening right now?
Does your favorite play? Or are you just interested in the outcome of the match? Online tennis allows you to watch every minute of the match and every single ball. If you don't have a TV or your match is not broadcasting, tennis online is your opportunity to watch what's on the court just when the match is happening.