How can the impression a candidate gives influence voters? How do the media help to portray a candidate’s impression?

It can influence their vote; Media's helps exploit any and all opinions, whether good or bad, to the rest of the Country.

The impression a candidate gives influence voters because if people think that a candidate is smart and looks good the impression tells voters that

citizens get the vast majority of their political and governmental information from the media, which includes television, print journalism, radio, and now the internet. the media play an important role in connecting people to government.