走 is a picture of a person swinging their arms (top) above a foot (止, bottom) — a body in motion. Interestingly, in ancient Chinese 走 meant 'to RUN'; over time it softened to 'to walk'. (The classical 'walk' was 行.)
走 means walk, but in conversation it often means 'to leave / get going': 我走了 ('I'm off!') is how you announce you're leaving. 走吧 = 'let's go'. As a radical at the bottom-left (辶, the 'walking' form), it appears in tons of motion words you'll meet: 这 (this — once 'to go to'), 进 (enter), 远 (far), 近 (near). Motion is everywhere in 走.
Arms swinging over a foot — a body in motion: to WALK, to GO.
走 meant 'to run' in ancient Chinese — it slowed to 'walk' over the centuries. Its squished radical form 辶 powers dozens of motion characters: 进 (enter), 远 (far), 这 (this).