The lyrics describe someone hearing criticism about her dating life, behavior, and intelligence, but choosing not to let those comments define her. The mood moves from listing what “people say” to a confident, lively response: she keeps moving, dancing, and reminding herself that things will be all right. Even when she sees an ex with someone new, she treats the moment lightly rather than letting it spoil her mood.
“Shake it off” means to let go of something upsetting instead of carrying it with you. The song connects this idea to dancing: moving to the beat becomes a playful way to release frustration. The repeated lines about players, haters, heartbreakers, and fakers suggest that some people will keep behaving badly, so their actions do not need to control her. “Making the moves up as I go” also implies that she can choose her own direction without following a plan.
The confidence here feels energetic, but it may also work as self-encouragement. Repeating that everything will be all right can sound like a firm belief, or like a reminder she gives herself when criticism and heartbreak still sting. The lyrics do not claim that these problems disappear; instead, they focus on refusing to dwell on them and choosing to keep enjoying the present.