Hi all , I just want to make clear i want to make a site ...where i am going to place a side wide Ad 160*600 Text ad on each on my web page .So please make one thing clear that should I have to get a different ad code for each page .or i can use same code unit on each page .
It depends on your site design. If you have separate sections with different designs, like; forum, blog etc. Then you can use different ad units. I suggest you try different ad units in different ad placements. See which combination give you the best CTR.
You can use the same ad code (with insert code option) on different pages but see that the ads find a prominent place in your site so that they become clickable and not pushed down to the bottom where no visitor can find them...