How the exhaust gas from gas turbine is utilised?

In modern Combined Cycle Power Stations, the exhaust gas from Gas Turbines, which contains significant amount of heat energy is diverted to water boilers to generate steam which in turn runs Steam Turbines. Usually Two or Three GT's exhaust gas is used to run a ST.

The significance of this is that, the otherwise wasted exhaust heat is intelligently used to generate power, thereby pushing the efficiency of a single GT of 25-30 % to a combined cycle efficiency of about 45-50 %.

Alternatively in some industries, the exhaust gas can also be used for process heating requirements.