脚步 (jiǎobù) is a noun meaning "footstep" or "pace." It refers to the act of stepping or the sound made by walking. For example, 放慢脚步 means "to slow one's pace."
她放慢脚步,欣赏沿途的风景。
Tā fàngmàn jiǎobù, xīnshǎng yántú de fēngjǐng.
She slowed her pace to enjoy the scenery along the way.
走廊里传来急促的脚步。
Zǒuláng lǐ chuánlái jícù de jiǎobù.
Hurried footsteps came from the hallway.
他加快脚步,怕迟到了。
Tā jiākuài jiǎobù, pà chídào le.
He quickened his pace, afraid of being late.