You can write about anything you like, know a lot about, or simply like to talk about. If you want traffic for your blog, write about popular stuff or things that are under debate (war, politics, or current things that are going on for the moment). For example:
Anyone can write the blog because blog is one type of information based on the particular topic, which will help people in many terms but if you write blog make sure that blog should be informative and helpful for people.
People who are interested in what you have to write about. If you write about personal stuff maybe your friends and family will like to read it. If you write about professional stuff make sure that people in that industry are aware of your blog.
The most popular travel blog online would be Travel Today. This blog has many different people that write for it and is read by millions of people daily.
It depends on what you want to do. With a blog you write about a subject, or get a guest writer to do it, then people can comment on that. With a forum people create there own topics for discussion.
There are many companies that pay people to write blogs. Some can be found at www.hongkiat.com/blog/sites-that-pays-you-to-blog/. Some examples include Review Me, Shvoong, Smorty, and PayPerPost.
You should get a blog only if you're interested in publicizing what you write.
Nickolas's blog if Nickolas is your name.
Click blog and click write a new entry and it will let you write a new one!
Anyone
you blog by puting a group code and then you write stuff.
You can comment on the blog, but you cannot write your own.
Blog services use for write personal thoughts.