Help me on how the sites like getWSOdownload get traffic to their sites

Help me on how the sites like getWSOdownload get traffic to their sites and how to target that particular niche.If some one can help it would be much appreciated i have a similar site like that and i want to promote it if anyone can help please reply.

i just checked getwsodo website, they get traffic from all course name, all of them are very low competitor because no one want do seo for their name, that why they have organic traffic.