Ranks (Helldivers 2)

Your Rank (or Level as it is in-game), like the first game, is a measure of a Helldiver's experience in the field. After gaining the required amount of experience from completing missions acrosss the galaxy, a Helldiver will advance in rank, possibly unlocking new Ship Modules, Stratagem permits and titles.

However, unlike the first game, titles are only unlocked after every 5 levels.