IT professionals perform a variety of duties that range from installing applications to designing complex computer networks and information databases. A few of the duties that IT professionals perform may include data management, networking, engineering computer hardware, database and software design, as well as the management and administration of entire systems.

 

So a Personal IT, is a IT professional that work for you, but also a number of other companies.  This gives you the benefit of an experienced professional while sharing the cost and problems solving over a greater number of people.