How to tighten a round opening - tutorial

So, you have finished crocheting your last stitch on one of the details. What now?

You are looking at a strange phrase «Fasten off, stuff and tighten the opening». Or maybe there is nothing at all instructed in your pattern. 

Does the designer suppose you know what to do with this loop you are now having on your hook? Does it obvious how to stuff, fasten off and so on? – Not always.

Especially if you are just learning how to crochet toys such simple things that are “supposed to be known” may totally frustrate you all the time. I crocheted for a few months before it occurred to me that I’m crocheting wrong side out.

So. Here it is :) (how I sew long openings I will show a little later)

 A detailed tutorial about round finishing