When it comes to self-publishing, one of the most important steps authors need to take is advertising their work. Amazon's online advertising services offer a great way for self-published authors to get their books in front of potential readers.

Amazon Advertising allows authors to specify who sees their ads. Authors can target potential readers based on their interests, demographic information, and other factors. This means authors can get their books in front of the right people.

Amazon also offers a variety of ad formats, including sponsored product ads, display ads, and video ads. Each format has its advantages and disadvantages, so authors need to experiment to see which ones work best for their books.

The cost of Amazon Advertising can be prohibitively expensive for some self-published authors. However, Amazon also offers pay-per-click (PPC) advertising, which allows authors to only pay when someone clicks on their ad. This can be a great way to maximize a limited advertising budget.

The return on investment (ROI) from Amazon Advertising can be hard to measure. Amazon does not track how many books are actually sold as a result of an ad campaign. However, authors can look at other metrics, such as the number of people who click on their ads, to gauge their success.

Overall, Amazon Advertising can be a great way for self-published authors to get their books in front of potential readers. Authors need to experiment with different ad formats and budget levels to find out what works best for them. If done correctly, Amazon Advertising can be a great way to get a return on investment and increase book sales.

Pros:

- Allows authors to target potential readers according to their interests and demographic information

- Offers a variety of ad formats

- Pay-per-click (PPC) advertising can be a cost effective way of advertising

Cons:

- Cost of Amazon Advertising can be expensive

- ROI can be hard to measure