>>sahaj+(OP)
That knot resembles the clove hitch, which is a very versatile hitch to attach a section of rope to an object. I think learning a few basic knots is an extremely useful life skill.
Just knowing how to tie bowline, double bowline and a few hitches will make you a more useful person.
>>yan+K1
My knot skills are horrible, I only know about 3 knots. At camping (real camping where we canoed 4 or 5 hours out to the middle of nowhere and camped) I had to do a zillion knots because everyone was so impressed at how I could tie things down correctly.
It was surprisingly helpful - I can't even remember where/when I learned them.