Does that single form of personalization outperform all others? That's what these academic researchers seem to imply.

Email produces the highest ROI. But that may not be desirable, given the need to invest in technology.

It starts with relevant copy. But don't neglect the basics -- subject lines, headers and teasers.

In-person contact is rated highest in providing emotional support to shoppers. Email ranks third, Invoca and Adobe find.

Financial advisors are busy, so they prefer email for market input, SunStar Strategic finds in study. Don't call them.

B2B buyers face many challenges, both external and internal, Showpad reports. Good email content can help.

Most retail unsubscribes are non-buyers. But even these can cost you money, a Bluecore study shows.

A Gartner L2 report shows retail apparel brands are using similar discount subject lines and mailing to overlapping subscribers.

It's not clear whether customers at a platform are the answer. But a study argues that marketers have to integrate all their martech stacks.

Sir Tim Berners-Lee's new company could disrupt business models and upend the internet, observers say.