The question of what is blog, who is blogger and how to become a blogger is a standard one for many newbie’s until and unless they jump on this blogging field. A blog is nothing but a (free / paid) platform where a writer / blogger can use it to write as per their own choice. A blogger is nothing but a writer or scribe who can use blogging platform effectively. The next answer with detail of how to become a blogger will come till you finish reading the article.
Yes, initially the newbie asks these questions to know some detail about it and later they create free blogs to share their personal topic as they desired. Once they get interested on this blogging (part time or full time work), they learn many new things on the way and move slowly for the desired subject beside personal one. Yes, while becoming as a blogger, they also come to know about how to increase blog’s traffic, what the popular blogging platforms are, how to earn money online from blogging and how to participate in blogging contest and on.
In general, the newbie either uses Blogspot (Blogger from Google) platform or Wordpress platform to create free account and blogging since they are initially blank with the ideas and it is very early to invest on this for. They would come to know other free blogging platform as well, sooner or later. However, these two are the top platforms and friendly guideline given.