Help info for each block
Just in case you haven't noticed yet, you can find out extra info about each coding block by long-pressing it. Here are screenshots.
If you have the current update (Hopscotch version 3) here's a pic:
If you have the older update (Hopscotch 2.0), details here.
1) Tap on the block you want to find out more about, and you'll see the menu on the left pop up.
At the top-right corner of the menu, you'll see the question mark (in the picture it is marked with a black arrow).
2) Press and hold down on the question mark, and you'll see the extra information show!
The information explains what the block does, and an idea you can use it for. This info appears for most blocks.
Edit: The tutorial project mentioned in here is no longer up to date, but you can still refer to it if you want as the descriptions are still the same. The Hopscotch Team have updated a lot of descriptions now (which is great!)
If you want to find out more about a block but it doesn't have a description, don't worry Funky 63 and I made a Hopscotch tutorial project.
It includes all the information you get from pressing the question mark, plus extra as well (the link is for Hopscotch v2.12).