When you're learning Japanese language, you will learn Kanji, as well as the grammar. Kanji is required to understand Japanese, especially when you're travelling to Japan, since most of the signs are written in Kanji. The more Kanji you learned, the easier for you to understand Japanese language.
By providing posts about Kanji, "Kanji Files" help you to recall your Kanji that you've ever learned and also help you learn new Kanji.