retargeting/remarketing

This method of advertising works so well because you already know that the visitor has an interest in your site. If you maintain a presence when this user browses the internet after visiting, familiarity develops which ultimately leads to trust. Once you have established trust, the sale becomes easier.

Business-to-business marketers will focus on in-house email marketing, social media, and especially referral/advocate marketing strategies in 2018. Read more about it here.