This is the strategy that most bloggers start with when looking to monetize their blog. However, keep in mind you're not limited to selling banner ad spots (which is generally an ineffective strategy these days). Consider other areas you could rent out: space on your pop-up box, social media headers, the "P.S." on your email newsletters...think outside the box (quite literally).
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My name is Jamie Spencer and I have spent the past 5 years building money making blogs. After growing tired of the 9-5, commuting and never seeing my family I decided that I wanted to make some changes and launched my first blog. Since then I have launched lots of successful niche blogs and after selling my survivalist blog I decided to teach other people how to do the same.

The answer is yes. However, I would caution against it. The reason is, when you use a free service, you don’t have as much control over your blog—the free service does. This can be risky, especially if you will rely on your blog for income. A self-hosted WordPress blog is my recommendation and can be started very inexpensively. See my step-by-step tutorial here.
If you’ve spent a lot of time writing that week and just need a break from working on a post, it may be a productive way to spend an hour or two but I personally think your time could be better spent elsewhere. (This isn’t to say that you can’t find success utilizing this method, I just don’t see many/any people doing it and reporting back that it’s really helped them).

Just thinking aloud here – but maybe you could put a guide together to help people choose the best art for their homes? Maybe in time offer a consultancy service – I bet there are some people who would pay someone to choose the art for them? I’ve seen that you are a self-taught artist – able to offer courses/consultancy on helping others learn art?
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.
Don’t get me wrong I have made many mistakes along the way but once I knew what I was doing it became a lot easier and more enjoyable. Many of my friends have emailed me or called me to find out more about “What Jamie Does”, but it can be a little hard to sink in at first as to how you can actually make a real income from running a successful blog(s). Therefore I have decided to create this guide for my friends, family, email subscribers and anyone else who wants to start doing “What Jamie Does”. 
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