The Huffington Post has hired veteran journalists to beef up its news coverage. But a significant chunk of its readers come instead for articles like one published this week: “Chelsy Davy & Prince Harry: So Happy Together?”

The two-sentence article was just a vehicle for a slide show of photographs of the couple and included no actual news. But “Chelsy Davy” was one of the top searches on Google that day, and soon after the article was published it became one of the first links that popped up in Google’s search results.

It was an example of an art and science at which The Huffington Post excels: search engine optimization, or S.E.O. The term covers a wide range of behind-the-scenes tactics for getting search engine users to visit a Web site, like choosing story topics based on popular searches.

Because Google is many Internet users’ front door to the Web, S.E.O. has become an obsession for many Web publishers, and successful ones use the strategies to varying degrees. But as newspapers, magazines, blogs and online-only news sites increasingly compete for readers, they are making it more of a priority than ever and adopting new techniques, like trying to maximize pass-alongs on social networks. More>>