Web applications of this type often have a geographic focus with customized content for end users. Content can be cached at edge locations for varying lengths of time depending on type of content. For example, hourly updates can be cached for up to an hour, while urgent alerts may only be cached for a few seconds so end users always have the most up to date information available to them. A content delivery network is a great platform for serving common types of experiences for news and weather such as articles, dynamic map tiles, overlays, forecasts, breaking news or alert tickers, and video.