introductory phrase

19 LETTERS · STARTS WITH I

introductory phrase is a valid 19-letter word worth 29 points in Scrabble and 31 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

I1N1T1R1O1D2U1C3T1O1R1Y4P3H4R1A1S1E1

1 + 1 + 1 + 1 + 1 + 2 + 1 + 3 + 1 + 1 + 1 + 4 + 0 + 3 + 4 + 1 + 1 + 1 + 1 =29 PTS

DOUBLE WORD → 58TRIPLE WORD → 87

MEANING

What does introductory phrase mean?