Your mailing list
Website visitors are forgetful. Help them remember you by offering a regular email newsletter to keep them informed about current special offers, new products or services, or interesting features of your website.
If visitors show an interest in what you offer, don't waste that opportunity. Give them an easy way to subscribe to your mailing list. Few people buy immediately. With a regular newsletter, chances are that one of your emails will reach them just in time for that next purchase to make.