I have played D&D only once as a guest in a campaign, so I have little to almost no experience. I am now in a new group, and am one of the two players that have played before. So between the new players the question about how you increase your stats was asked. Just to be sure I read again the handbook and realized that I didn't know if the answer I was about to give was correct.
After reading I was troubled about the ability score imrovement between the race and the class. I don't understand which one you use when the class table reffers to ability score improvement. I came to a conclusion that you use the race improvement at the beginning and the class improvement on every level that mentions it but I am still not certain and I want to give a clear and correct answer to the new players.