introductory

Adjective

• serving as an introduction or preface

• serving as a base or starting point
  • a basic course in Russian
    
  • basic training for raw recruits
    
  • a set of basic tools
    
  • an introductory art course
    

• serving to open or begin
  • began the slide show with some introductory remarks
    

Related words

• Synonyms: 
  prefatorial , prefatory , basic