Refinancing your mortgage means you apply for a new loan hoping to secure a lower rate.
There are two forms of refinancing: Rate-and-Term Refinancing and Cash-Out Refinancing. Both of them have their advantages.
It is important to do research before you refinance so you can get the best deal and save the most money possible. Refinancing requires a large time commitment for it to be done properly. You have to make sure you know what you're looking to gain through refinancing before you commit yourself to it.
Cash-Out Refinancing differs from using home equity in that you are using you mortgage to secure a cash loan as opposed to using the value of your home.