First, take a look at your website. Does it need an update? Is it easy to read and navigate? Is your messaging clear? Are your contact information links and social media links present on the home page?
If you have built a Facebook page, keep engaging with your customers. You may find that you will have to start spending a few dollars a day to boost your post visibility. WIth Facebook's detailed demographics, it is still cheaper than many other alternative.
Just remember, your website should be your central hub of your business online. Everything should point to it including your social media channels.