How do the Warlock spell slots and slot levels work?

How do I level up? What do I get from leveling up? level slot It cannot appear at the top level of your markup; it must be inside an if or each block or passed to a component's slot to prevent an infinite loop level789 slot Slot Administration

level slot CONSIDERING THE SEVERAL COMPLAINTS WE HAVE BEEN RECEIVING FROM INDIVIDUAL CANDIDATES ABOUT THE DIFFICULTY TO GET A SLOT FOR THE