you don't use the Intel for a specific purpose. if you collect half of the Intel in the game you will get an achievement. if you collect all of the Intel you get another achievement.
By finding it tthroughout the campaign like in all other cod games
you find it by looking around all the levels for lab tops that are just siting there for no reason
See the link below for a video of the Intel locations in Modern Warfare 2.
Nothing, but there is at least 1, 2, or 3 enemy Intel items on each campaign mission, 22 Enemy Intel items gets you an achievement that is worth 25 Gamerscore and if you get them all (For Xbox it's 45 items), you get an achievement that is 40 Gamerscore.
Yes, you are rewarded for collecting enemy Intel in Modern Warfare 2. The rewards are for collecting 22 and 45 enemy Intel items that are in the form of laptops. When you collect 22 and 45 Intel items you are rewarded with a bronze trophy (PS3) or 10G (Xbox 360) each.
To get all hidden intel on the terminal you have to type 3arc intel and it will say this cheat will disable the "Find all intel" achievement do you want to continue? Click yes and there you go.
Intel is an item you will find in every level their are three in each level. once you find one it will erase the highlighter in the Intel page for that mission for a website that tells you where all the Intel is [is] located in the related links below.
To get 100% completion you need to get all the campaign achievements. So basically beat the game on veteran and find all of the intel.
you have to collect all 30 enemy Intel items and activate it from the options menu
if you get all intel, you get an achievement.
nothing you just get achievements but infinity ward said that they will do what they did on cod 4 modern warfare 1 and make cheats for when u collect them