If you are planning a trip to South Korea, make sure you stay for at least a week to tour the different cities and spend at least a day in each.
However, language is a huge barrier. The vendors don’t speak English even in touristy areas so be prepared with a translation app if you don’t know Korean.
Spring and Fall are the best seasons to visit Korea because of the very harsh climates of the Summers and Winters here.
Korean travel apps are very useful for first time travellers to keep track of buses and trains.