Recently i had a discussion with one of my colleague about 301 and 302 re-directs. I also want to share/ discuss this thing here also. According to me 301 is a permanent redirect which is Search Engine Friendly redirect. 302 is a Temporary re-direct which is not search engine friendly. Now question is that I believe that 302 opens on the browser only and some scripting language is used and i also believe that Crawler do not read scripting language that is why the link is neither index nor cached through that re-direct. And my colleagues point is that the link is crawled and indexed and cached by the crawler but Google do not give advantage of it. Please share your views about this and please do provide some links also where we can read about it properly to clear our doubts.