Choosing a niche that you want to blog about can sometimes take really long. Except if you know what your interests is. But for most people that just wants to quit their day jobs and start blogging this is not that easy.
You might have a interest and you want to make money from that interest but not all things can be made money from. Before going into a niche you must check if there are advertisers for that niche. Otherwise you might waste your time and money to get a blog going but then when its up and running you realize that you cant make any money out of this niche.
Niche blogging is easier than just blogging because you dont have to struggle to get a topic to blog about since you entire blog surrounds a certain topic. But choosing the wrong niche to blog about as I said just now can be a lot of trouble and annoying since you wont really make the money you deserve from the time you put into your blogging.
So this is where keyword studying comes in. There are many tools for this such as google adwords checker and some other place where you can see if the keyword you decide to blog about can make you money.
I will feature those later.