Why You Should Learn Katakana (+ 40 useful words to get you started)

Katakana is mostly used for writing loan words that originate in other languages, or names and places which do not have a kanji form. This is why katakana is so useful.

What are Hiragana and Katakana used for? Do I need to learn them?

When to use katakana and when to use hiragana, learn the difference.