Own and Host your Blog on your Website
I encourage clients to experiment with third party blog accounts to learn the ins and outs of maintaining posts, but when you go live with a professional blog that you regularly update, make sure that the template, blog code and system is hosted on your website domain. If you use a third party website to publish your posts such as Tumblr, or Blogger, realize that those domains will be generating advertising revenue from your content. If you control the data and are hosting the growing number of visitors to your site, then it is your property and you will be able to monetize it.