Everyone makes a blog to earn money. But money can be earned through a lot of mediums; you can read about them at 5 ways to monetize your blog. However, if you are just concerned about using advertisements in your blog, then have a look at the following ways:
1. Use Text Ads: these are in the form of simple text. On click, they open the product or service website and you earn money for the click.
2. Banner Ads: Next is Banner Advertising. There will be graphic accompanied by the text in this type of ad. The best banner ads are from Google AdSense.
3. Image Ads: Some companies want to exhibit their ads when mouse is rolled over an image. These days, image ads have become a trend.
4. Products Related Advertising: Pick up the products of your niche from some store and then display the advertisement wisely.
5. Blog Sponsors: Get paid by advertising agencies for showing their ads on your blog. They are time bound ads. You can decide upon the money that you would charge for these ads as per the time period for which they will be shown on your blog.
Use these methods and let us know the feedback on these options.