Look at the price tag
find the item on ebay to see what other are selling it for
The term that best fit the blank is RELEVANCE. The Google Adwords system is a system that is created by Google for the purpose of advertising online. Therefore, relevance is very important in this aspect as this shows how useful the ad is to the consumers who are doing the google search.
I would a Standard Access control List
There are two common access lists: The standard and extended access list. With the standard access list, it creates filters only on source addresses and is commonly used for server-based filtering. They are not as powerful as extended access lists. Standard Access lists are typically used for restricting access to a router through HTTP and HTTPS.
Presentation software is probably his best option. It would allow him to present visual and audio supplements to his audience.