Moving by words
To move to the next word, use the w command.
The w command considers separator characters when deciding where the next word starts. To only consider whitespace as word separators, you can use the (uppercase) W command.
To move in the opposite direction, use the b command to move over a normal word, and the capital B command to move over "big words".
There is also the e and E commands that move to the end of the next word or bigword.
If you prefix the above commands with a number, the command will move that many words. For example, the command 3w will move three words to the right.