The vocabulary around daily standups and the agile ceremonies, roles, and artifacts that surround them.
An estimation exercise where everyone privately picks a point value and reveals at the same time, to avoid anchoring on the first number said out loud.
A relative unit for estimating effort — not hours, just a rough comparison of how big one story is versus another.
An estimation method where stories get sized as XS/S/M/L/XL instead of numeric points — rougher, faster, no false precision.