Google wants to make search more social
Tweeting on the news, Twitter's lawyer Alex Macgillivray described it as a "bad day for the internet".
Google is determined to push its social network in the face of continued rivalry with Facebook.
The current changes were about even greater personalisation, it said. It already includes personal search history in its search algorithms.
The three changes are:
- Personal Results - which enable users to find information such as Google+ photos and posts, both their own and those shared specifically with them, that only they will be able to see on their results pages
- Profiles in Search - both in autocomplete and results, users will be able to find people they are close to or might be interested in following
- People and Pages - helps users find people profiles and Google+ pages related to a specific topic or area of interest, and enable people to follow them with just a few clicks.
"But clearly, that isn't enough. You should also be able to find your own stuff on the web, the people you know and things they've shared with you, as well as the people you don't know but might want to... all from one search box," he added.
Twitter's general counsel Alex Macgillivray tweeted in response to the changes: "Bad day for the internet. Having been there, I can imagine the dissension @Google to search being warped this way."
Mr Macgillivray had previously been employed at Google.
Full report including Google's response here.