Eevee uses a process called Temporal Anti-Aliasing (TAA) which reduces aliasing. TAA is sample based so the more samples the more aliasing is reduced at the cost of performance.
- The number of samples to use in the 3D Viewport. When setting this to zero the viewport will be resampled continuously.
- The number of samples to use in the final render.
- Viewport Denoising
- Reduces noise while moving the viewport or during animation playback.