Advantage of Regular Expression (Regex) over normal way of text searching
Just Imagine that you're on the hunt for those 'apple' words in text file which are coming after word 'green'.
In Notepad++, when you search without enabling the 'regular expression' option, you'll get ALL the "apple"s, and that's not what you want!
But with the magic of regex and a simple checkbox tick, you can find those "apple"s which are coming after word 'green'
Just because of this difference, Regular expressions are becoming top useful thing for text search operation.