Hello friends,

I would Like to know that What is long or Short tail keyword?

Short tail keywords are 3 words or less. Examples include: "athletic apparel," "DVD player," or "engagement ring." Short tail keywords are also known as "head" terms.
Long tail keywords however are a little different compared to short tail keywords. These keywords are more than 3 words.

Long tail keywords are those three and four keyword phrases which are very, very specific to whatever you are selling. You see, whenever a customer uses a highly specific search phrase, they tend to be looking for exactly what they are actually going to buy.
Short tail keywords are search phrases with only one or words.