Different people will use different screen resolution, thus the same web page will looks different when coming across different screen resolution.
Web developer need to take this issue into account when building websites.
This enables the web site to use as much as the “space” under the specific screen resolution. No space will be unused.
It can detect screen resolution and redirect the visitor to a page optimized for their particular resolution.
Researching for the visitors is also vital:
Studying web site log files
This provides the web developer s with advanced information on the most popular screen resolution, browsers, browser version and … etc.
Test web site
Practice becomes perfect. Try to test the site under different screen resolution, browsers, versions and operation system combinations.