For those of you that are wondering what you are going to do without "Google".. you don't have to worry.. this is Google +.. a service you obviously have never used. I say this because if you did use it you would know that it has nothing to do with Google Search and/or Google Gmail.
Your personal Google+ account is going away on April 2, 2019
Google+ was Google's attempt at a social network to compete with Facebook, which never really went anywhere. Google has many services that come and go and so this Google+ is just one more.
So if you are wondering what you need to do, the answer would be NOTHING! If you know what Google+ is and you actually did use it then you will also know what to do with regards to any items you may have posted that you want recovered.