As a Yasuo play since the day he was out, I love him, when you dash around and make sick outplay and such. But as he change through time we can agree that it easier for him to go mid then where he suppose to on top. He squishy, very weak, but when you get to win you're lane everything is just pretty much get one shotted, it is no fun, you aint getting that feeling of dashing around, kiting, the thril of juking and outplaying. This is the build for you, you are tanky, you can get to jukes around all you want, extending the fight since you didn't have that much damage, but you can feel free to dash in the enemy line without afraid of getting kill. This is the build for those who want to show off their skill, to show that they are good, I never felt so much fun since I play yasuo with this build.
A little note that this is the first time I make a guild, so if it turn out to be wrong, then forgive me (I mean things like layout or bla bla bla)

This build make you strong into the late game when you finally get to finish your items, it also reduce a lot of counter that yasuo have to face againts on top. And a perfect way to bully the enemy tank. You also wont die from ganks that easy now that ur tankier.
The cons is that, these items gonna cost a lots and it take times to finish your build. Most game I played I didn't get to buy my 4th item.

Stack your Grasp, then dash up, poke him then dash back, that pretty much all you have to do
Combo and ult him when you're jungle come gank. Then just go do everything what a toplane should do. If you new to the game, first focus on getting the first turrets, then the seconds one, if the seconds turrets is too hard to get then move to your team where they need help, like securing dragons, help bot/mid take turrets, counter gank etc.