I have cupple of questin regarding IT Infrastructrue management and want to complete explanation.
what does IT Infrastructure means?.
what strategy I have to follow to make infrastructure more effective?.
Does effective IT infrastrucre increase business ROI?.
we need to hire some one for designig INfrastructure or does we can manage ourself?.

IT infrastructure is all the computer hardware, networking gear, wiring, WiFi, power supply, and software that your systems utilize. How many desktops, laptops, and servers does your organization require/have? What about networking? Backup power for servers? Managing and maintaining these (both hardware and software repairs, patches, and upgrades) are all part of IT infrastructure management. These days, you should hire someone, but if your organization is small, then there are many IT contractors out there that will deal with your systems on either an hourly basis, or contract basis.