Traditionally, defining a target audience involves determining their age, sex, geographic locations, and especially their needs (aka pain points). Check out usability.gov’s description of personas and how to do task analysis & scenarios for more details, or better yet, read Vanessa Fox’s upcoming book about personas related to search and conversion.
But you should understand that you won’t become instantly rich by selling product. This type of business is highly competitive because there are many other people into it. How to make money online in India can be simply answered by following these hacks to gain success in the field: through affiliate marketing, you need to understand the market, know how products are promoted, and understand how it works.
For example, let’s say you’ve found a product that you think will benefit your blog’s readers. Once you place an affiliate link for the product in your blog copy, your audience members can click on the link and be taken to a page on the affiliate’s website that can lead them to a sale. Any time someone buys the product through your link, you will receive part of the money from that sale.