Long Tail Keywords are not a long collection of words or phrases. LTK’s are search terms that do not receive a large amount of traffic, BUT, they have a good conversion rate.
WHAT DOES THAT MEAN?
It means that if you can rank for these words and phrases, the opportunity for a conversion is much higher!
HOW DO I FIND LONG TAIL KEYWORDS?
There are tons of SaaS available, I like Moz.com, AHrefs is very good, SEMRush too. Google “Keyword Research Tools” and you will not have an issue finding a solution. There are numerous sites that have a limited “free” keyword search service.