Been using pop clip for a while.
For me it's really handy to:
Highlight a name, word or phrase and instantly google it
Highlight something and copy it instantly, then paste it easily
Instant google translate
Highlight anything and send it to Evernote
They're the main things I like it for
Finding Dictionary meaning of the highlighted word is that it ? is that what all this APP does ? This is already inbuilt in safari when you do a three finger tap on a highlighted word ! right ?