This document discusses key terminology related to type, including readability, legibility, leading, kerning, tracking, justified text, and white space. It explains that readability is affected by factors like point size, leading, line length, and alignment, and ensures text is comprehensible. Legibility refers to typeface design elements like counters, x-height, weights, and serifs that distinguish letters. Leading refers to the spacing between lines of type, while kerning is the spacing between two characters and tracking is the spacing between all characters. Justified text aligns both sides of paragraphs but can cause issues like rivers of spaces. White space leaves room on the page to create emphasis and guide the reader's eye.