Information Technology Certifications offer potential benefits and increase job performance whether you are just starting or have a long career. An IT certification is a certification that certifies your proficiency in a particular sector of information technology (IT).    Are you looking for cissp practise questions? Information Technology Certifications offer potential benefits and increase job performance whether you are just starting or have a long career. An IT certification is a certification that certifies your proficiency in a particular sector of information technology (IT).