Bing search results will now include tips and recommendations from Foursquare users, Microsoft in a blog post Wednesday, while Google is apparently testing a feature that lets users share a link in Google+ directly from their search results page.

The developments show the companies continuing to compete over how best to integrate social content with search. Bing continues to partner with existing social networks, while Google continues to build on its own.

Bing will display tips and recommendations shared publically to Foursquare about businesses or other locations relevant to a user's search query and location, Microsoft said. The search engine displays the Foursquare content in its , which launched this spring. The tips and recommendations will be included in the "people who know" section, which doesn't require the Bing user to be signed in to his or her social networks.

"This is only the beginning of Foursquare integration," a spokesman said via email.

Also on Wednesday, industry watchers spotted Google testing a "share" button next to some search results that allows users to post the returned link to their Google+ profiles. Screen shots of the feature were to Twitter by a search marketing specialist in the U.K. and by Search Engine Land.