SEO is hugely important to ensuring that your site shows up in the search results for the keywords and phrases most relevant to your business. Let's say you sell gourmet cupcakes. If someone searches for "gourmet cupcakes," your website should show up, right? What do you think might happen if the phrase "gourmet cupcakes" is nowhere to be found in your title tag, on-page content, or even in your product descriptions? As you might have guessed, the answer is "nothing."
Coupon: Unlike the job application, you probably know very little about someone who has stumbled upon one of your online coupons. But if they find the coupon valuable enough, they may be willing to provide their name and email address in exchange for it. Although it's not a lot of information, it's enough for a business to know that someone has interest in their company.