"impact" usually suggests an event that changed something in a large way, and not voluntarily: "The market downturn impacted our sales." "Mobile phones have impacted everyday life in a way nobody could have foreseen." "influence" suggests that a person or thing had an effect on you or some process, that was (at least somewhat) voluntary, or sometimes suggest that it only one of many factors affecting the process. "His new book was influenced by current events." "The market downturn influenced our future marketing plans." "Changes in solar radiation have a major influence on wheat production." Notice here that there no suggestion that the effect is voluntary, since it is natural, but that it is not the only factor causing the effect. (By the way, I made this sentence up, I don't know anything about wheat production!)

Hi Gabi, I'm going to keep this simple with examples. Politicians try to influence voters. Think "Brexit"! The result of the election causes an "impact", that is, governrment polices must change.

impact means changes happen in your life by realization influence means changes happen in your life by forcibly ( as u like )by someone .