Digital ads are getting smarter. Are advertisers?

Check out a pair of shoes online, and you may find them following you around: in a display advertisement parked in the margin of a news story, or in the otherwise minimalist corner of a search-engine results page, or perhaps in the subject line of an email.

Just how effective are 'free shipping' emails?

There’s a reason consumers are flooded with emails offering two-for-one discounts, free shipping, and 30 percent off—research suggests the deals work, perhaps even better than intended.