Div- the basis of all coding, works as a divider for different parts of code.
Img- every tag that allows you to place images into your code will start with this.
Style- a trait, meaning that it can help to shape up the code how you want it to look and keeps it neat.
Margin- the word that you want to use when things seem out of place in your code. Very important when you want to increase or decrease the distance between one div and the next.
Borders- little things that wrap themselves around text or a text box and help add to the appeal of a code.
Overflow- this guy will help you to hide things that you don't want others to see. Like scroll bars or hidden text.
Background- pretty explanatory but this thing helps to add color to the back of a code and most often is used for text boxes.