in game screen laggy

inside the game everything is laggy for me i move it stutters and when i use an ability or anything it jitters.please help me anyone pls.

Intel® Core™ i5-3337U Processor (3M Cache, up to 2.70 GHz)

Intel® HD Graphics 4000

that is my proccesor and if anyone can help me to tweak to fix it or anything pls comment thank you for your time