What is the difference between wordpress.com and wordpress.org. I saw that you can download wordpress or create a blog for free at wordpress.com. I read somewhere that you can’t use ads on wordpress blogs. I’m confused. I just want to set up a couple of blogs and monetize them eventually. Help please.
That is correct. In the future, using ads may be available to us through a paid upgrade as revealed in the last paragraph on the features page: http://wordpress.com/features/ . If having ads is important to you then you can get a webhost and self-host a blog using the software from http://wordpress.org/ .