There are many reasons why you should get pre-approved. The most important reason is that you will get an accurate idea of how much home you can afford. This can help to target your home search and ensure you only look at houses that are truly in your price range
Before trying to get pre-approved for a home loan, check your credit reports and credit scores. By taking this first step early on, you’ll have an idea of what kinds of loans you may qualify for, and you’ll have time to clear up any mistakes or problems you find on your reports before you start home shopping. You can elaborately about the same here https://www.credit.com/loans/mortgage-questions/how-to-get-pre-approved-for-mortgage-home-loan/