Google stresses that Collections is a set of posts on a particular topic that provides “an easy way for you to organise all the things you’re into.” Google+ users can share a Collection publicly, keep it private, or share with a limited number of people.
“Once you create your first collection, your profile will display a new tab where other people can find and follow your collections,” adds the Google+ post introducing the feature. Of course, Google+ Collections will also allow users to follow collections from different people.
“Posts in collections you follow will appear in your Home stream, with a link to easily jump right into the collection so you can get to similar content from that author. Collections give you a great way to find more of the stuff you love from the people you follow,” notes Google+ post.
To create a Collection on PC, a Google+ user will have to select the Collections option on the Google+ profile homepage to create a new one. Enter a name for the new Collection and choose who it should be visible to. Google+ users can also create a new Collection on Android app in the same way.
Google+ Collections support page notes that users cannot change collection’s visibility setting after creating it. Some featured Google+ Collections have already gone live.