How much you can make from a blog has a direct relationship to three things: 1) Amount of traffic. 2) Type of traffic. 3) niche.
If you picture these three things in a Venn diagram the sweet spot is where all three overlap. If you have lots of traffic in a popular niche and the traffic is interested in buying what your advertisers are selling the skies the limit. But if any one thing is missing your opportunities are severely limited.
So if you want to make good money with your blog you will need to put the effort and time into getting traffic to your site. Most big advertisers aren't interested in advertising on your site until you have at least 10,000 unique real visitors a day.
For a good analyis of this problem check out https://www.quora.com/How-many-visitors-per-day-does-a-site-need-to-draw-any-significant-ad-revenue Then go buy yourself a cold beer and figure out how your going to do it.






