Google announced today integration of google+ into search with a name “Search, plus Your World”. google said that they are always working for the best results in search engine. But According to Google
“Sometimes that means results from the public web, but sometimes it means your personal content or things shared with you by people you care about. These wonderful people and this rich personal content is currently missing from your search experience. Search is still limited to a universe of webpages created publicly, mostly by people you’ve never met. Today, we’re changing that by bringing your world, rich with people and information, into search.”
Now with the integration of “plus your world”, search engine will not only understand the content but also it will understand the people and relationship.
Google has introduced three new features for search which are listed on Google blogpost are as follows:
1. Personal Results, which enable you to find information just for you, such as Google+ photos and posts—both your own and those shared specifically with you, that only you will be able to see on your results page;
2. Profiles in Search, both in autocomplete and results, which enable you to immediately find people you’re close to or might be interested in following; and,
3. People and Pages, which help you find people profiles and Google+ pages related to a specific topic or area of interest, and enable you to follow them with just a few clicks. Because behind most every query is a community.

check out the video to understand more about these changes:
for full description about these changes you can also see Google blog post here.