Thanks Donna for taking the time to write this excellent comment. I agree with you 100%. A blog can give you an income from offline sources and is a great way of diversifying into different areas, but again it also depends on the niche you find yourself in. I always say to people to not be too reliant on one source of traffic or one source of income, because they can vanish pretty quickly.
• WordPress.com: Not to be confused with WordPress.org which allows you to create your own website, WordPress.com is a free basic blog hosting service that's easy to use. However, you will have to put up with WordPress ads and branding unless you pay a monthly fee, and you can't put advertisements on your site. There are also limited options for customisation and expansion
If you are using a free blog hosting service instead of your own domain name, you must provide high quality content with a limited number of relevant links or risk being shut down. If you are only interested in writing short, quick product reviews in order to earn money, you will need to host your own blog. Be warned that low-content, high-link blogs are a less reliable, though lower effort, way to earn money.
Once you setup your account on AdSense you will be given a code to add to your blog. This code will automatically display advertisements on your blog from companies who are part of Google’s advertising network. You may see ads from small companies related to your topic, or you may see ads from large companies that are completely unrelated to your topic.