By default, if you are aged 13–17 Google+ limits most of the information on your profile to people in your circles, although some fields like name and photo are public.
By default, if you are aged 18+ most of your profile information is public. Google+ allows you to adjust your privacy settings to control what information you share and who you share it with.
To adjust your privacy settings, you can:
Right: an example of the account settings options
Circles are groups of people with whom you share content. Circles help you organise people according to real life connections. By organising people into circles you can share relevant content with the right people, and follow content posted by people you find interesting.
If you are aged 13–17 and add Public or Extended Circles to a post, Google+ will remind you who will potentially be able to see your post.
To manage your circles, you can:
Right: an example of Google+'s reminder when a person aged 13–17 adds Public or Extended Circles to a post.
More information is available at Google+'s Create and manage circles page.
Hangouts lets you connect with people face to face through live video chat on Google+.
If you're aged 13–17 you must consent to hanging out with people who are not in your Circles. When you initially join a hangout, you are consenting to hanging out with everyone who is there. When someone outside your circles joins the conversion Google+ will pull you out and ask you if you want to continue. More information is available at Google+'s Teen Safety Guide.
Right: an example of Google+'s minor controls in Hangouts.
If you don't feel comfortable 'hanging out' with someone you can block them. For details of what this means visit Google+'s Blocking People in Hangouts page.
Google+ has settings to help you control how people can interact with you.
If you're aged 13–17, by default both of these settings are set to people in your circles. If you're aged 18+ the default set to Anyone.
To access these settings, you can:
Right: an example of how to control how people can interact with you on Google+.
In addition, Google+ lets you prevent others from commenting on or resharing your post. When you post on Google+, others are able to reshare your post. If you want to prevent this from happening, you can lock your post. Once a post is locked, others won't be able to reshare it or make comments. To lock your post:
You can disable comments and reshares after you share too. Just click the drop down arrow at the top of the post and click Disable Comments or Disable Reshares. Keep in mind that this won't retroactively apply locked settings to your post.
If you'd like to enable reshares and comments on your post at a later point, click the drop down arrow at the top of your post and select Enable Comments or Enable reshares.
You can remove comments from your own posts that make you feel uncomfortable. To remove a post, hover over the comment in question and click on the grey X that appears on the right.
You can also disable comments completely from a particular post. Click on the menu button in the right-hand corner of your post and select Disable comments.
If you see content that violates Google+'s User Content and Conduct Policy you can report it directly to Google. These reports are anonymous.
Right: an example of how to report a comment on Google+
Right: an example of how to report a post on Google+.
Right: an example of how to report a profile on Google+.
Blocking someone on Google+ will prevent that person from engaging and viewing your content from that moment on.
To block someone, you can: