Although there are legitimate companies that help Web sites improve their rankings, according to Google's page about SEO, most such offers that arrive in e-mail messages are of little-to-no value. The search engine's own Webmaster often gets SEO marketing offers suggesting that Google doesn't show up well in search results (which is quite unlikely). Google's recommendation for Webmasters? "Reserve the same skepticism for unsolicited e-mail about search engines as you do for "burn fat at night" diet pills or requests to help transfer funds from deposed dictators."
Email marketing is the practice of nurturing leads and driving sales through email communications with your customers. Like social media, the goal is to remind users that you’re here and your product is waiting. Unlike social media, however, you can be a lot more aggressive with your sales techniques, as people expect that email marketing will contain offers, product announcements and calls to action.