Selling physical products online can be hard to setup as you will need to deal with storage, shipping and even deal with things such as local taxes and distance selling laws. Of course a lot of this headache can be resolved by finding a company who will offer a white-label or drop shipping service leaving you to worry about getting traffic and updating the website.
The easiest PPC method to get started with is Google AdSense. However, in order to make any kind of decent money with display ads, you’ll need quite a bit of traffic. And by the time you get that much traffic, you’ll make more money going with an ad management company like Mediavine (minimum of 25,000 monthly impressions) or AdThrive (minimum of 100,000 monthly pageviews).
Have in-depth knowledge in your niche? Package it up into an ebook and sell it on your blog. I'd generally advise against selling it (at least exclusively) on Amazon or Kobo, as you'll probably be able to charge much less. If you've already built up a solid audience, you can probably change anywhere from $5 for a very short one, all the way up to $39+.
21 Strategies I Used to Increase My Monthly Page Views from 17k to 400k+ in 10 Months – Lena Gott's guide is full of great information on how to increase your blog's page views. If you are feeling stuck or if you are a new blogger, check out this resource! Lena went from 17,000 monthly page views to 400,000 and shares all of her best tips in this guide.