How does frame rate work in video and animation?
Frame rate, abbreviated as fps (frames per second), is the speed at which individual images are played back in succession. Our brain combines these frames into smooth motion. At around 24 fps, you already experience a cinematic look, partly due to natural motion blur. In Europe, 25 fps has historically been the standard; 30 fps is common in the US and online. Higher frame rates provide more detail during fast movement and reduce motion blur, but place greater demands on the camera, lighting, storage, and playback device. Recording and playback go hand in hand: if you film at 60 fps but play back at 30 fps, you either sacrifice frames or use the surplus for slow motion. Don't confuse frame rate with shutter speed: that determines the amount of motion blur per frame. Timing and rhythm (including fps feel) can be tested efficiently with an animatic. Read: what is an animatic.
Choices such as "on ones" or "on twos" influence the perception and required frame rate in 2D. Read more: what is 2D animation. Do you want to produce a video in the right fps? Have 2D animation made.
In 3D animation, the frame rate is often related to the render output, motion blur settings, and the distribution channel. This provides important context for your choices.
Do you work with puppets or objects? The impact of fps is particularly noticeable in frame rate in stop-motion (smoothness versus jerkiness).