Affiliate ads give bloggers a choice of programs to provide links to products. Bloggers are paid when someone purchases the advertised product. Amazon Associates and eBay Affiliates are examples of affiliate advertising programs.
Many bloggers offer an option for visitors to purchase advertising space on their blogs.Direct ads are typically shown in the form of banner ads or similar display ads provided directly to the blogger by the advertiser to be uploaded to the blog. Pricing and payment methods vary from blogger to blogger (often dependent on the amount of traffic the blog receives). Direct advertisers on blogs are sometimes called sponsors of that blog.
Reviews (often called sponsored reviews) are an indirect form of advertising on blogs. A company might contact a blogger directly asking them to write a review for a product, business, website, etc. If the blogger is paid to write the review, then it is a form of advertising revenue. Some companies offer forms of review advertising such as PayPerPost.