To start with Googles attempt to get a slice of the social networking market dominated by Facebook and Twitter was only offered to journalists and people working in technology related fields.
However, members’ ability to invite friends meant its user base quickly grew to tens of millions.
Google+ has been praised for several innovative features including its multi person “hangouts” video chat.
Two weeks after it launched, the company announced that its service had attracted 10 million users.
It has not produced official figures since then, although estimates by web analytic firm Comscore put membership at 25 million by the end of the first month.
Despite users’ apparently rapid uptake, research carried out by Australian web software maker 89n suggested that the rate of public posting was declining. The survey did not take account of private postings.
Alongside its full public launch, Google is adding several new features to the service, including video hangouts on Android smartphones – allowing multi-person chats.
Users will also be able to share the content of their computer screens with whoever they are talking to.
Hopefully the increased competition will see even more new innovations from all the social network players that will give users
The rise of Google+ has not gone un-noticed by its competitors.
Facebook has recently rolled out a number of innovations which many observers have characterised as a direct response to the Google challenge, although the company argues that these have been in the pipeline for far longer.
These include a revamp of the social network’s friend system, making in easier to add people to categories, similar to Google Circles.