Another great exercise if you’re trying to decide on a niche for your blog is to think about who your ideal reader is. This is the person most likely to visit your blog and get value from your writing. For me, the easiest way to think about this is to use myself as an example. If you’re writing about an interest, then you’re most likely your ideal reader.
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.