Why should politicians utilise the internet for their election campaign? ?

They have a further reach than just the area they are in.  They can access social media, websites, and news outlets with the internet.  It can save time and money as well.  A wide range of audience is available via the internet.  People in current times seem to be highly influenced by the internet.  Those are just a few ideas that came to mind.  If you have multiple choices, list them.  You can also stick around a little bit and see what others have to say. 

They can reach waaa more people with their message. For example, I don't watch TV, but if I see an online article, video, or social media post about a politician that I'm interested in, I'll look at it. In fact, the majority of what I know about politics I know from the internet. I can easily choose from candidates by Googling their platforms and reading their ideas straight from their campaign websites. It just makes information readily available to the public.