how do i use torrents to download files?

i downloaded tuneUp utilities and i try opening it but nothing happens. and what does it mean when it says its seeding? im new to all of this. any advice can help... tutorial videos or walkthroughs would be great.

Be wary, as you can download virus from torrents unknowing, which maybe included with anything you download, as the person who uploaded it may have been infected with a virus.