In this video, I will talk about the key aspects of styling and labelling data in QGIS

Referred videos in the video
Advanced symbology in QGIS


0:00 Introduction
1:45 copy/paste styles between layers
3:23 The two layer styling/symbolization tools
4:45 The basic components of a style
6:53 Saving and reopening a project, and what is a QGIS project file
9:18 Saving a styling outside a project
10:56 Saving a Raster layer style
11:40 Styling Points
12:10 A remark on HSV vs RGB colour and QGIS colour picker
12:30 Hue
13:15 Saturation
14:07 Value
15:27 Symbolisation principles (Categorical styling)
18:03 Graduated Symbolisation principals
20:50 Sum up of styling
21:50 Labelling
22:50 Rulebased labelling