I don't know which is the correct forum for learning about new features but the top forum in CMT is "Suggestions wanted for PBS".

The Help Documents will help you learn how the site works. https://www.paperbackswap.com/help/help_index.php

Here's the page listing the Features. PBS also used to send out a newsletter and the What's New page used to keep an ongoing list of all the new features, but these haven't been updated very recently.

You can also suggest a new feature by going to the bottom right corner of any page. Under "Company", click on "Contact Us" and use the Feedback option there.

Does anyone remember the last time PBS added a new feature?  I don't.

Yes, I think it was the friends preference option for when you post a WL book. I know many members were not happy that friends of members could skip ahead in the WL line. I saw a rash of folks requesting me to be their ' friend' after that even though I did not know them at all through chatting, playing games, or participating in the raoks. I do not do ' auto friends'. 

It's been a few years since there's been a newsletter.

It appears the best way to discover a new feature of PBS is when you stumble across it, either because it just shows up on other features you use, or by stumbling over it by chance. 

In my case, the newest feature I discovered is the option to select the cost of postage when acknowledging receiving a book. I think this is helpful, as postage rates seem to be changing much too often. And the previous dropdown menu you basically auto-created youself often had old postage rates on it.