If a page is not available for a known reason and a specified text is displayed in the page, then WebSite-Watcher can prevent an update notification with that feature. A typical example is a web forum which displays sometimes the text "Too many users online, please try again later" instead of the topics.
Open the bookmark properties
Select the Advanced tab
Select "Ignore Updates" on the left side
Enter the text for which WebSite-Watcher should prevent an update notification. (one phrase per line)