Google has said something important about robots.txt files which most websites and your's too, likely has. There is a right and wrong way to generate it. You can learn it here, and if it sounds too technical you can share it with your web developer. If done wrong and fixed, could potentially get you more leads for your listings.
Come to Huliq.com for other useful stories realtors can use to increase their web visibility or stories shared by fellow real estate agents about good practices that may help you get more leads.