Long tail keyword is the combination of three or more words to gain huge amount of search traffic. Here Long tail keywords focus will be on 1)how keywords are specific 2) what will be collective search volume of keywords.Let us take one by one 1) how keywords are specific : Since long tail keywords are specific, their ratio of conversions will be high. 2) What will be collective search volume of long tail keywords: Long tail keywords make around 40% traffic around web. Here individual volumes might be low. But there are so many phrase combination, collective volume will be high.