First things first - every blog needs an angle. Now, if you’re part of the small percentage of people who are blogging purely for their personal interest or the benefit of friends and family, skip on down to hosting and domains and don’t worry about your direction, monetization, or promotion.
Most bloggers, however, will have slightly loftier ambitions. Even if your plan is to simply start blogging and “see how it goes”, it will stand you in good stead to do a little planning around your approach before you start committing words to screens.