Wordpress Generates 3 image sizes for every imported image

[Dan Hilerowicz]

Wordpress Generates 3 image sizes for every imported image,
I know that I can disable this feature
Does anyone know if it's necessary?
Does it help for the page speed?

 

[Victoria Kudryashova]

Wordpress Generates 3 image sizes for every imported image,
I know that I can disable this feature
Does anyone know if it's necessary?
Does it help for the page speed?

You don't need to disable this feature , if you switch it off it will not influence the page speed.

 

[Dan Hilerowicz]

Thanks,
I just wonder what is it for?