An Open House is an opportunity to view the home with or without a Realtor. Many times you will be asked to sign in as Realtors like to keep track of who came and went so the seller is aware. This also allows the Realtor to follow up with your or your Realtor with any additional information you may have needed about the home. It is also a great way to meet Realtors and interview them if you are in the process of finding a Realtor.