preceding vs introductory

preceding and introductory both are adjectives.

Word	Noun	Adjective	Verb	Adverb
preceding	No	Yes	No	No
introductory	No	Yes	No	No

preceding (adjective)	introductory (adjective)
existing or coming before	serving as a base or starting point
of a person who has held and relinquished a position or office	serving to open or begin
	serving as an introduction or preface