The overhand knot is a basic building block but we rarely use it on its own.
It’s possible to finish rope ends by tying an overhand knot in them, although it’s not the most durable solution.
Traditionally, the overhand knot is used as a stopper knot. We have to confess that we have never once found ourselves in need of such a thing.
1Cross the working end under the standing part.
2Go over the standing part and under the working end.
3Snug the knot.
This knot is ABOK # 46
It is distressingly common for people to confuse the overhand knot and the half knot. Thank you for being part of the solution rather than part of the problem.