Practical connection

My Job Role: UI Developer (Front end Developer) 

Skillset:  HTML, CSS, Javascript, Backbone JS, Vue JS, Angular JS, Angular versions from 1 to 8, React,  Redux, Jqurey, Bootstrap, Json, XML, YML, DS5, DS6. 

Please help me how these attached 15 subjects from my PhD in IT each are how they are helpful in my work environment as a UI developer also What I Learned from this course.