UX Designer vs Web Designer
UX design is User Experience design and it tends to be invisible or side of design. All the work that goes into creating an app, website, software, or service. UX design includes design and user research, information architecture, interaction design, usability testing, and content strategy.
Web designers may be graphic designers who work on the web or developers who had built enough skills to create a good looking website or app. Web designers tend not to take human-centered approach of UX design.
Psychology is attached in UX design to help understand how people think, and what motivates them. Web design tends to be less iterative, whereas UX design is about integrating continuous improvements.