Google has put a lot of work into integrating Google+ into its core products – such as Gmail and YouTube – and today, the company is launching an update that will integrate the social network with its search engine.

The search giant wants to demonstrate that not only does it understand content, but also people and relationships. The update, called “Search plus Your World,” introduces three new features: Personal Results, Profiles in Search, and People and Pages.

Personal Results enable you to find relevant Google+ posts – such as photos or links – from friends within search results. The search page will give you a mix of personal results with results from the web. Personal results, which are only visible to you, could highlight a friend’s activities experienced during a trip, or an exotic dish tried at a new restaurant.

Not only are your friends’ vacation photos displayed in your search results page, but you can also find your own private photos from Google+ and Picasa. Keep in mind that only you will be able to view these; search results will differ for each person based on their Google+ Profile or Page.

Profiles in Search enable you to immediately fine people you’re close to or might be interested in following. These results will appear in search results as well as in autocomplete. Additionally People and Pages will help you find profiles and Google+ Pages related to a specific topic or interest.

For example, if you search for a topic like music, you might see prominent or influential people that frequently talk about music on Google+. This is a great way to find brand evangelists and other influential industry contacts.

It’s important to note that when you’re signed in to Google your search results – including private content, such as photos – are protected by the same level of encryption used in Gmail. You can control what appears in personalized search results by marking content as Public, Limited, or Only you. Additionally, you can toggle between web results and personal results at the top of the results page and can change your default settings to show no personal results.

You can read more about Google’s security efforts on its blog.

[Image credit: Jerry Paffendorf]