With STO, when they create new episodes / missions they try to get you to replay them 3 times by a) offering them with no minimum character level and b) having a new gear item and a character skill point buff each week, usually for 3 weeks.
The gear items are a set, with set bonuses for using 2 or 3 of the items on your ship or (for ground gear) your character. For ground it might be combat armor and a shield, for a ship it might be a beam array and a buffing console.