Hue/Sat Slider confusion

[Adooby-doobie]

Hello everyone!

I have a question regarding sliders in the hue/sat adjustment layer. I watched some tutorials where the guy(Piximperfect) cranked up the hue and saturation sliders to the highest to effect a colour change. With the slider below, he played around until he could get an accurate selection.
Can someone please help me understand in depth and detail the slider below? 

Thanks

 

[Jeff Arola]

Here under

Specify the range of colors adjusted using Hue/Saturation

https://helpx.adobe.com/photoshop/using/adjusting-hue-saturation.html

[c.pfaffenbichler]

One can drag the four handles individually to edit the affected range. 

What are you trying to achieve? 

[PECourtejoie]

Hi, there is an excellent explanation on why Unmesh first cranks the saturation: it is to see the affected area easier:

https://www.reddit.com/r/photoshop/comments/1bo050e/huesat_slider_confusion/

[Trevor.Dennis]

Yep.  First thing I do after using the sampler tool to select the initial colour range, is move saturation ro 100% to see if the colour range I am aiming for has been encompassed in the colour bars.