It's a simple, graphical navigation bar that uses anchor tags to allow readers to jump easily from post to post. (treehugger.com)
(Yes, you can add html anchor tags in your video conversation starter or reply description.) (5minutesformom.com)
Unfortunately, there's no anchor tag to link directly to the relevant portion, so you'll have to use your browser's find function with a portion of the quote to find it if you want to read it in the original source. (politics.stackexchange.com)