The Return of the Ring
Unique to Final Fantasy II is a conversation system whereby you learn keywords and can ask them to certain NPCs. This system gives players a bit of agency when it comes to the flow of conversation. Throughout the game, you will be required to learn and repeat many keywords to many people. In this guide, all keywords, such as Wild Rose, will be marked thusly, so they stand out from the rest of my ramblings.
If you are new to the game, take a moment to return to the sigil room (the room you woke up in) and speak with the people there for several brief tutorials. The level system in Final Fantasy II is a bit different than any of the other games in the series: There is no experience and you instead level individual abilities based on how often you use them. There are several ways to abuse this system to make your party overpowered, but I feel this takes most of the fun and challenge out of things, and is not something I recommend for a first playthrough.