Use the +1 button

Important: Some websites may let you +1 things directly from their page. Those +1's are public, so a good rule of thumb is to only +1 pages when you’re comfortable sharing your recommendation with everyone. But if you +1 something you find on Google+ like a post or photo, you can use your settings to choose who may be able to see it. Unless you change your settings, people in your circles and extended circles may be able to see what you +1 on Google+.

Add a +1 on Google+

1. Open Google+ or the Google+ app .
2. Find the post you want to +1.
3. In the bottom left corner of the post, click or touch the +1 button.

Tip: You’ll know you’ve added your +1 after the button turns red. And if the button says a different number than 1, it’s showing the number of people who +1’d the post before you.

Undo a +1 on Google+

1. Open Google+ or the Google+ app .
2. Find the post you +1’d.
3. In the bottom left corner of the post, click or touch the +1 button.

Tip: You’ll know you’ve removed your +1 when the button turns white. You can also delete your +1s from your Activity log.

If you want to see posts you’ve +1’d on Google+, check out your Activity log . If you want to see the things you’ve +1’d outside of Google+, you can visit the +1s tab on your Google+ profile.

Computer

1. Open Google+.
2. Near the top left corner, click the drop-down arrow > Profile.
3. Under your cover photo, click the +1’s tab.

Android app / Mobile browser / iPhone/iPad app

You can’t see your +1s on a mobile device just yet. Please check out the +1s tab from a computer.

When you +1 a Google+ post, the creator of the post will get a notification. And other people, like your circles and extended circles, may see your post in their stream or search results if they had access to the original post. But if you don’t want people in certain circles or your extended circles to see your +1s, you can see and delete your past activities in your Activity log. Or you can choose who can see your +1s using the instructions below.

Important: Remember, if you +1 something from a site that isn’t Google+, it can be seen by anyone on the web.

Android app

1. Open the Google+ app .
2. Touch the menu button/icon> Settings.
3. Touch the name of the account > Sharing > +1s from posts.
4. Choose a circle from the list, or touch Or pick people and circles. If you don't want anyone to get updates when you +1 a post, touch Only you. But remember that people who look at the original post may still be able to see that you +1’d it.

Computer

1. Open Google+.
2. Near the top left corner, click the drop-down menu  > Settings.
3. Under "Manage other apps & activity," click Manage apps and +1's on posts.
4. Click the Google tab at the top of the page.
5. Under “Visible to,” click Edit.
6. Under “Who can see your +1s on posts activity?" click the drop-down menu .
7. Choose a circle from the list, or click Custom to include multiple circles and/or individual people. If you don't want anyone to get updates when you +1 a post, click Only you. But remember that people who look at the original post may still be able to see that you +1’d it.
8. In the lower right corner, click Save.

Mobile browser

You can’t adjust this setting on a mobile browser. Please use the Google+ app or a computer to choose who gets updates when you +1 a post.

iPhone/iPad app

1. Open the Google+ app .
2. In the top left corner, touch the menu icon .
3. In the top right corner, touch the settings icon .
4. Touch Sharing > +1s.
5. Next to the circle you want to add or remove, touch the checkbox, or scroll down to choose individual people. If you don't want anyone to get updates when you +1 a post, remove all circles and people. But remember that people who look at the original post may still be able to see that you +1’d it.
6. In the top right corner, touch the checkmark . 

The shared sndorsements setting controls whether people see your name and face next to the +1 button in ads, if they’re looking at a product or brand you’ve +1'd. If you’d like more information, you can learn more about shared endorsements.