The basic idea

Your fingers rest on the home row: left hand on a s d f, right hand on j k l ;. Each finger moves up, down, or slightly sideways from that home position, then returns.

Letter key chart

FingerKeys
Left pinkyq, a, z, shift
Left ringw, s, x
Left middlee, d, c
Left indexr, f, v, t, g, b
Right indexy, h, n, u, j, m
Right middlei, k, comma
Right ringo, l, period
Right pinkyp, semicolon, slash, shift

What about numbers?

Number-row technique varies, but the common rule is to keep the same diagonal zones. Don't let one finger do all the work. If numbers are part of your job, practice them separately; they're a common source of hesitation.

Shift key rule

Use the opposite hand for Shift. For a capital A, press left-hand a with the left pinky and use right Shift. For a capital P, press p with the right pinky and use left Shift. This keeps the typing motion balanced.

Do you have to be perfect?

No. Many fast typists have small personal variations. But if you're a beginner or stuck in a plateau, learning the standard zones removes a lot of confusion.

Practice finger placement
Use guided lessons to make each key reach automatic.
Open finger-placement lessons

Quick answers

Which finger presses B?

In standard touch typing, B is usually pressed by the left index finger, though some typists use the right index.

Which finger presses Backspace?

Backspace is usually pressed by the right pinky.