Do you have a blog? Why? Do you have much you must share with the world? Is it good to be able to say whatever you want? Are there restrictions? Do you read blogs? Why? For a very long time, I thought I wanted 1 but I guess not because I never did it. Please do not post your blog's name or URL without checking forum rules. <>
Blogs were the primary from of publishing before large scale social media platforms came along. I had a LiveJournal account (technically still do) where I published all the stuff I now post to Facebook. You had more room and more freedom to post what you wanted, but the downside was that people had to find your blog to follow you. Facebook makes writer/reader connections far easier.