I have got an adsense account few days ago and I have created one adsense code and have put it on blog. I have 3 more blogs can I apply same code to those blogs too? Or I have to create new channels and codes? Plz help
You can use the same code but I HIGHLY don't recommend it. Use channels. Takes like a minute to regenerate a code and add a channel... The information you get by using channels is extremely valuable.
You should always create a new channel for each ad, in order to allow you to know the statistics of each ad unit. Based on the stats, you can optimize the ad placement and color schemes, and hence get the most from them. http://www.dagsensecodes.com/2006/12/what-is-adsense-channel.html
Yes, you can use the same ads codes to as many places you like. But, to track the individual performance better set a channel
I strongly recommend to use channels for each of those as u got 3 or more blogs so that u get to track which blog gets how many impressions or clks etc......Anyway its ok even if u use the same code as long as its the same type of ad u want in all of ur 3 blogs...I mean skyscraper or rectangle etc...