> 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/n-r.md). # N - R #### P #### Pacing Pacing is the control of spend rate within a campaign, specifically regarding how steady it is. Custom pacing is a control in which you can choose a value to pace to; e.g. a $10 hourly pace will keep your campaign steadily spending up to $10 within each hour, rather than pacing directly to availability of space which is often less predictable. #### Polygon tool Polygon tool is a selection tool that you use to select screens on the map. You can use the polygon tool by clicking multiple points to create a shape. All screens within the shape that you created will be added to your selection. #### R #### Reach Reach is the number of impressions that have been made/reached for a) each ad play, b) the number of ad plays or c) the cost/budget spent. #### Recommended hourly spend Recommended hourly spend is an estimated rate of spend/amount that you should spend during each hour that your campaign is active. This amount is calculated based on the average cost of play on CAASie (varies screen to screen) as well as an assumption that your ads may play on each screen once every 2-5 minutes within the hour. #### Resolution On CAASie, resolution refers to the number of pixels that can be displayed on a screen/board and the requirement for corresponding ads. If a screen has a resolution of 1080x1920, it means that the screen can display 1080 pixels across its width, and 1920 pixels across its height. Screens that are viewed from afar away usually require fewer pixels (have a lower resolution) than those up close. If you have questions about a definition, please contact for assistance.