The following sites (listed below) provide archival access to some well-known print and audio-visual ads. We also have quite a few collections of television commercials on DVD, as well as books on Advertising that often feature images of print advertisements. Try the search terms "television advertising" or "advertising".
Some companies or organizations will archive advertisements on their website. You may also be able to locate television commercials on the company's official Youtube channel.
Many mass media and advertising channels (such as newspapers, magazines, radio stations, etc.) produce media kits and/or advertising rate cards, which can help companies as they develop their advertising and promotion strategy.
Media kits contain information about the audience (circulation figures for print-based products, and online or mobile audience demographics (age, gender, income) for online/digital media. Advertising rate cards may provide current prices for placing advertisements on websites, in print publications, or across media channels with the same media company.
To locate the media kit and rate card for a specific source, do an internet search for the name of the source and the words media kit For example:
The following sources provide additional insight in specific media channels. Some reports are updated annually, while others may have been "one-time only" studies.