To cut off ends really short after tying a knot.
So, I would like today to address the issue of finishing the job.
When you have gotten to the end of your pattern or project, what do you do next?
Going back towards the skein, at least 6 inches (15 cm) away from where you are working, cut your yarn.
Wrap the yarn around your hook and pull it through the loop just as if you were making a chain.
Now, keep pulling it through, making the loop bigger, until you pull it all the way through.
Pull that end tight.
You don't need to tie any other knots in it. Thread your end onto a blunt yarn needle.
Turn your project wrong side out and run your yarn needle under the threads and loops along the back, taking care not to take your needle to the right side of your fabric. You don't want the end you're "weaving in" to show up on that side.
It is best to weave in the end in multiple directions.
I have seen others suggest running your needle back through the yarn end to help secure it. This is done by poking the needle between the plies of the yarn that you've already woven in.
If those ends are really slippery, and they won't stay put, then you can use a dab of fabric glue (non-washable) to hold them in place.
Why is this the way to do it? If you tie a knot and cut your end off short, chances are it is going to come undone in the wash or when undergoing the stresses of being worn, and then unravel. In addition, it is also unsightly, and there is no way to hide it (see below).
Long ends are much better than short ends! This is also true for your beginning end, which needs to be at least 6 inches (15 cm) long as well.
Hopefully I have helped someone finish a project well. I know that I did not understand this as a beginner. Hopefully, you will learn it quicker than I did.