For many of us who are deep diving into the full functionality of Community Builder and its many addons, one of the most used pages is "Using Substitutions throughout CB". However, it is a challenge to find it when we need it!
Try searching the site for "substitutions" using the sidebar search and you will get 3 pages of links (default 50 links/page), with the one link needed found on page 3, item# 110 out of 146. That link tells us that the articles is listed under "(Tutorials)". Turns out that it can be found by going to Documentation / Community Builder / Tutorials.
I know it is a small thing, but the fact that it is not intuitive to find it, means that many users are not likely to see it or use it. Which leads to possibly unnecessary forum posts that you guys then have to respond to.
My suggestion? Please make a link to it on the main Documentation page. It will be easier to find for first timers as well as those of us that use it often.