I don't have anything to sell. I just want to let other businesses know about my services.
That is often the case. There is no better way for you to "put
out your shingle" and let people know that you have a business.
You will also have to invest in making your website easily found
by the search engines so that you are near the top of their
results. That is a whole separate topic. Click Here for more information on gaining recognition.