The information represented is depicting the daily use of internet throughout the population. Through a bubble chart the data is separated, each bubble representing a different activity that the population exercises with internet and the frequency of the use of internet.
The survey was conducted by Pew Internet & American Life Project Tracking surveys during March 2000-Febuary 2012. Many activities are represented here, but it is important to underline the fact that not ALL activities are pictured here, just a small majority.
The Bubble Chart is efficient because the categories are clearly represented and it is easy to understand the percentage of people using the internet and what for.