Short Tail vs. Long Tail keywords, what type of keywords you should use?

1. What to use, short tail or long tail keywords?
If you want to increase the conversion rate of your visitors, then use
long tail keywords. People who use long tail keywords know exactly
what they want. For example, when they really want to purchase a
laptop they will type, "Dell Inspiron 1520 midnight blue". If they
knew what they want they are close to buying it. If they are just
looking for information about what's the best laptop for them, for
example they would type, "laptop reviews", which this kind of
keyword is so common.
According to many studies, people searches using short tail
keywords want only information or something related to that.
Only few individuals have had success using highly
competitive keywords. Because everyone is using it, it's hard
to compete. Unlike when you use long tail keywords, it's
targeted, though it can bring only small traffic to your site, but
the conversion rate is higher. People searches using long tail
keywords are close to buying something because they knew
exactly what they want.
Long tail keywords can make you rank first page on Google because
you only have few competitors. So the more you use long tail
keywords the more success you will have. So if you have specific
products to offer, optimize your page using long tail keywords.