If you're outbid, you will receive an email that will easily direct you back to the bidding page where you can bid again! Here's what that notification would look like:

You will also be notified by text message if you have a phone number attached to your account. Here is a walk though on how to receive a text message notifications!

Or you can also keep an eye on your My Bids page to track bids, or set a "Max Bid" to allow the platform to bid for you!