Are Shepherd's Notes the same as a commentary?

I overheard someone talk about [Shepherd's Notes](https://www.olivetree.com/store/product.php?productid=77410) . They described it as Cliff's Notes for books of the Bible and will help you understand things you read in the Bible. However, to me it sounds like a commentary. If anyone has used Shepherd's Notes before, is it the same as a commentary? If it's the same as a commentary, why would someone use Shepherd's Notes? I [found them on Amazon](https://www.amazon.com/s?k=shepherd%27s+notes&crid=N5I6J0TBKDTZ&sprefix=shepherd%27s+note%2Caps%2C160&ref=nb_sb_noss_2) but there wasn't any sample pages for me to skim. Also my local libraries don't seem to have them either for me to look at either.