Google+ has a unique and interesting way of finding, identifying, and sharing new content that you’re interested in, called sparks. The purpose of the sparks feature is to provide, or spark, new ideas or content you can share with your friends on Google+.
Choosing your sparks is simple. You can choose any topic you like. If you like bacon, you can add a “bacon” spark that will provide you with news about bacon. You can then share that content with your friends on Google+. Pick the things of most interest to you.
Click the Sparks link in the left column of your main stream on Google+.
The Sparks search page appears, as shown in the following figure.
The Sparks search page in Google+.
Choose one of the featured sparks or search for something of interest to you.
Review the content of the spark and click the Add Interest button.
This adds the spark to the Sparks list in the left column (see the following figure).
Your list of sparks appears in the left column of Google+.
Click the spark on the left to read its content.
Repeat Steps 1 through 4 to add more sparks to your list.