Basically, Screen Resolution refers to the text and the displayed images on your desktop so we can not relate this to designing a website. The most common screen resolution is 1024×768 in which 1024 pixels is the width and 768 pixels is height.
There are some base names for screen resolutions such as - for TV's (HDTV and UHD) and for computer monitors (XGA and WQXGA).
Purpose, Audience and Theme they all are used for designing a website.
