Identify Your Target Audience

Marketing segmentation which helps you to arrive in desired website
design is:
Age group: Define clearly to whom you are intending to present your
products or services.
Education: Whether you are aiming at school children or college going
student or professional, their educational background will help you to
come into the conclusion about the lucidity of the language to be used
during website design.

Technical knowledge: If you are dealing with some technological services
then analyze which type of technical knowledge your end users possess as
this will help you to analyze about their strengths and abilities.

Graphical orientation: Judging the taste of the customers will help you
to arrive into the correct graphical orientation to drive sales to your
website.

So when the web developer clearly outlines all these aspects of website
design by studying the target audience all other things become easier.
Like the screen resolution, graphics format, fast load times, language etc.

So by understanding the needs of the target audience it becomes
relatively easy for the website designer to solve many questions that
come up during web design.