Too many times the self promoting author settles for any and all opportunities to share their books at any site. As if the more exposure and links, the better. Yet many times the effort and time that it takes to accomplish this would have been better used with a game plan.
Would a company that sells vitamins put all their efforts and marketing into the automotive industry? Would a company that sells medical supplies put all their efforts and marketing into the food industry? No and it is the same with the self promoting author. You must find your market. The market that best suits your book.
If you have written a book about fishing, your market is anything that has to do with fishing, to include the outdoors, camping, fishing supplies, camping supplies and so on. If you have written a book about healthy foods, then there's your market. Health, foods, healthy living and so on.
Find the market that best suits your book. Google that market and find ways to market your book within that market. At the very least, you will get some insight.
While you here read some of our other posts on book marketing and view our links.