> For the complete documentation index, see [llms.txt](https://support.caasie.co/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://support.caasie.co/best-practices/glossary-of-terms/a-c.md). # A - C #### A #### Active hours Active hours refer to the hours in which your campaign is turned on/active. This is determined by a customisable schedule. If, for example, you have set your campaign to run between 9.00-10.00 am from Mon-Fri, then your campaign has one active hour per weekday, or 5 active hours per week. Total active hours is the number of active hours within your entire campaign. #### Ad Ad is an abbreviation of Advertisement and it is public communication on any media. In the case of CAASie, it usually refers to the content of the advertisement or to the file that’s uploaded to CAASie. #### Ad Play/Play An “ad play” or play happens when a single ad is loaded onto a billboard or ad screen for a certain predefined duration (or slot length within the screens schedule). #### Approval Approval, or artwork approval, is a clearance for an artwork to be displayed on a public screen. Approval is given when an artwork complies with all ad policies, relevant T\&C’s, restrictions and legislation. #### Artwork Artwork is a piece of design that displays your company’s message. It is in the form of JPG, PNG or MP4 #### Aspect Ratio Aspect Ratio is the proportional relationship between the width and the height for a screen and/or corresponding artwork. A common aspect ratio for screens is 16:9, where if a landscape screen is 16 units wide, it must therefore also be 9 units high. If rotated to be portrait, it would then be 16 high and 9 wide, but is still described as having a ratio of 16:9. #### Audience Audience refers to the people, or groups of people, who are likely to be exposed to your advertisement when shown on screen. #### Availability Availability in CAASie refers to the frequency of available spaces/opportunities for your ad show within. If a screen’s schedule is able to show e.g. 6 different ads within a scheduled loop, but only 5 already occupy the loop, then there is available space for one more ad to play. If this occurs frequently, the screen is deemed to be highly available. There may be times when all spaces within a loop are occupied, and the screen will have no availability for that time. #### B #### Bid Strategy Your bid strategy is the method or preferences for which you choose to compete for available space on screens. CAASie works on a real time bidding/auction process, meaning that your campaign will automatically compete for available space based on your custom budget. However you may choose to control/influence this process by capping your bid price/cost, per ad play. #### Billboard Billboard is a large (usually outdoor) board for hosting/displaying advertisements. Digital billboards, like the ones on CAASie, are electronic and can display digital ads, rather than printed ones. #### Board A board on CAASie is the collective term for digital screens. It can be in reference to a roadside large billboard, or a small format screen inside e.g. malls or gyms. #### Budget Budget is a maximum cap on how much credit you are willing to spend during a campaign. ## C #### Campaign A Campaign on CAASie is a distinct project, which holds a specific set of rules or parameters for which you want to run your ads. #### Cost-per-play Cost-per-play is the cost for a single showing of your ad on any screen/board. #### Credit Credits are purchased tokens which can be exchanged for delivery of ads to screens/boards. The theoretical value of CAASie credits is matched to the US dollar. If you have questions about a definition, please contact for assistance.