This map does a great job of highlighting the great variety of alphabets that exist all over the world, and how they were developed (e.g. a syllabary is a phonetic writing system consisting of symbols representing syllables). As it shows a sample of writing for each alphabet, it allows us to concretely understand the information. However, this also makes it hard to read, particularly in areas where a wide array of alphabets coexist, such as South-East Asia.
Similarities between countries or continents that share the same alphabet are highlighted through the use of color, and serve to demonstrate the impact of colonization. Nevertheless, it does not show the diversity that exists within each alphabet: for example, the Latin alphabet can be found within each continent but from it are derived many languages. This means that if you know it, and because of its prevalence around the world, there would still be some way of communicating, but going to Japan for example and looking at the signs in the street would feel like looking at a riddle.