In my opinion, this is the best way to read in text from a csv file.
Take for example if you are importing addresses:
"1 Main Street","SmallTown","SmallCounty"
The above is fine and easy to parse in BUT what if an address like this was entered:
"App 1A, Tall Towers","SmallTown","SmallCounty"
By setting the parser setting delimiter to the comma AND also marking that the fields are enclosed in quotes, the parser knows the comma in the middle of the quotes is not a delimiter and therefore brings the text in as one field.