Do you think it’s possible to sell a product you don’t know about? I guess in the offline world, aggressive salespeople can get away with it but not in the attention starved Internet. It’s important to assume your website visitors as having an extremely short attention span. If they’re not happy with your site-design or if your headline is irrelevant to what they’re looking for, they will leave your site in a heartbeat.
This is why knowing your product plays an important role. If you sincerely understand the problem your product solves, you will understand the mentality and buying behaviors of your target market. You will then customize your landing pages including the headlines and content according to their needs. In addition, familiarizing yourself with your products will help magnify your keyword list. Knowing your product will open doors and broaden your scope for promotion.