Are they spending many minutes on the page? Or, are they arriving and leaving quickly after 30 seconds or so. Keep in mind that your posts should be lengthy, so plan to write at least 1000 words per article or more. On this blog, I focus on a minimum of 2000 words per article. Not to be verbose. But because I know that value and engagement is delivered in length, not in brevity.
Working with advertising networks isn’t your only option when it comes to selling ads. If you end up with enough traffic, advertisers may come directly to you and ask you to place their ad on your site. You can also contact advertisers yourself. The biggest difference from the above mentioned option is that there is no middle man, which means you can set your own ad rates.