Dear,

ICT is basically Information & Communication Technology .It can be called  higher level of IT. IT is a subsidiary of ICT. ICT has all aspects of IT i.e development of apps and software's, maintenance and monitoring of database. Along with it, it also focuses on Communication sector. Networking, mobility, telecommunications, e-mail systems, all possible internet communication (Skype, email, calling , messaging apps, etc. ).ICT reads more about communications.

Hope this helps!