Spec ads are those ads which are not published or just presented to the client for pitching a job. For a job seeker it means ads that are not published or made for presentation purposes only. Advertising agencies often pitch for a job with SPEC ads and so can you! If you have a little experience with some copywriting, layouts, designing ads but feel they have no scope for showing your creativity then create a Portfolio or Book that showcase it.
Check out some top television Spec ads
Great ideas to start off your Portfolio.