Advertisement for SaaS companies

Hello there, IndieHackers!

I am not really sure that this topic has not been raised before, but whatever... Now I am at the beginning of promoting our service (speclix.com) that`s for a low monthly fee builds and designs websites for small businesses, also we write all the content for clients, maintain their website, hosting, domain etc. I guess it is not a surprise that it is difficult to bring traffic to your website. With that being said, I would like to ask our powerful community to share your TOP 3 sources of advertising your SaaS companies. Do not be lazy to write a short message in comments, it will give a plus to your karma and be very appreciated and helpful for us! Thank you in advance!