What does 'self-running' presentation mean?

We will use a mouse to make a PPT move from one slide to another. Sometimes when making a video from PPT, we will need the PPT slides to move automatically without using a mouse. So, we have to set a timing for our slides and animations in PPT and this can be done using Rehearse Timing. Rehearse timing helps to set the timing of each slide and animation. This has been explained in detail in the resource articles.