If you're in the WebTrends UI you can find a report GUID (for use in building a rest query) by looking at the javascript tag information that displays when you hover over a report in the left-nav. In this case, I am hovering over the link to the report "Same Visit Campaign Names". The browser will display the javascript that is executed when this link is clicked in the lower left-hand corner of the window (circled below). The tag displayed contains "dynamictables<table GUID><Chapter>" You can view the properties of this link to pull this text out and then copy only the GUID portion, which is simply the text between "dynamictables" and "Chapter". In this case it is "aK1I9lMxvL5". This comes in handy if you're viewing a report and want to quickly pull up the data using the web services.