Common Content consists of approximately 60 questions, with about 40 in the pre-election wave and about 20 in the post-election wave. These questions are included on all administered surveys and amount to a 30,000+ person national sample survey. Common Content is asked at the beginning of each survey.
In addition to these questions, YouGov Polimetrix provides demographic indicators, party identification, ideology, and for most states, validated vote.
Common Content Data, Guides, and Cumulative Files can be explored here.