Consider affiliate programs. By finding an affiliate program suitable for your blog, you agree to provide links to a company's products, and in return are paid for each reader who makes a purchase after following your link. You can find specific companies by searching an affiliate directory such as ClickBank, or by searching individual company websites for affiliate programs. Consider these factors before you choose an affiliate program:
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).
Adsense is a contextual advertising network that places partner (business) ads on your website. It’s easy to set up—all you have to do is copy and paste some code given to you from Google in the places you'd like the ads to appear on your website. Google will then show ads from advertisers that are a match to the content on your website so that ideally your website visitors see relevant ads.
In-depth tutorials are great for getting links and social shares. However, they can also be a great way to earn money on your blog. There are a number of ways you can make this happen - include affiliate links for the products you use in your tutorial; promote your own products in the tutorial; write a tutorial to promote an advertiser's product (just be clear that it's a sponsored post), etc.
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.