Torrenting is the term of using a torrent client to download content online. In some countries this practice is frowned upon. If you want to use torrent sites without your ISP knowing, you need something that takes this activity elsewhere.
In order to avoid your ISP, you need a to use a virtual private network, or VPN. This means your entire internet connection goes through a secure server, usually by a company that maintains a very high integrity and promise to not keep track of you. This way you can go wherever you want and nobody will know but you.
Here are our recommended VPN providers. Most of them come with an internet security suite, but some are stand-alone: