Based on recent information provided by web analytics firm comScore, Facebook’s market share in some countries is extremely high. However, if you look at the overall population of some of these countries, it is very small.
For instance, comScore reports that 87 percent of online visitors in Peru use Facebook, but only 27 percent of the people there have Internet access. You do the math; it’s not that huge.
Nevertheless, Facebook dominates the market in these countries, which is very rare for any company. And there are 10 countries that have more than 86 percent Facebook users.