Which niche(Topic) for Blogging?

What is a niche? What is its importance? A Niche is a topic on which your blog is dependent. A Blog without a niche is a boat without a sailor. You can make a blog on a niche in which you are interested or choose a niche because of its market value. For example you can chose the niche " Fitness and Health". So all the audience in your blog will be those people who want to become fit and seek advices in the process. Niches may be limited up to some extent or they may have a large variety of content. Before going with any niche, first of all always check its market value and go through a series