Don't put all your words on it, you'll get tired. Don't make it look like reading a document, it has no effect at all. Illustrations are essential. Take the text, pictures should be close to the narrative content, interspersed with some interactions, and do more cases, which will help employees remember, and at the same time, it is easy to mention employees' desire to learn, so that employees can learn knowledge unconsciously and be impressed.
As for the PPT template, it is better to do it yourself, which is closer to the actual needs.