Since I'm new to Dungeons & Dragons 5e, I don't understand how ability scores work. I searched the Basic rules and the Player's Handbook, but I can't find any clarification on this question: Do you gain 2 ability score points to add with every level gained?
I know there's something called Ability Score Improvement, and I think that means you get to improve 2 ability scores by 1 (or you can add both of them to the same ability) but is this in addition to the 2 you get every level?
I'm playing a level 3 Cleric, and I have a wisdom score of 17. My ally (level 3 fighter) has a strength score of 19 and a dexterity score of 18.
Can someone explain to me how increasing ability scores works?