On surface level, using rotating sliders within your website isn't inherently harmful to your overall search engine optimization efforts. When implemented correctly and used in the optimal location, this popular website element can be a great tool for showcasing content and generating online sales. Sliders done right can provide SEO benefits as well, but webmasters rarely install it properly.

1. Know that your overall return-on-investment will decrease as the slides change. This is simply because people have minuscule attention spans and aren't likely to stay in one spot (on your website) for very long. The first slide or two will always get the most attention, and that's a fact.
2. Make sure to compress all of the media you use within rotating slider elements. Although it is important to only use high-resolution images and videos in these spaces, these files are always enormous in their raw forms. Heavy duty content like this should always be compressed prior to being uploaded to ensure that the media doesn't slow loading speeds and harm the overall user experience. 
3. Don't forget to double check how your slider looks on all devices – not just your desktop. (Google indexes mobile search first, after all!)
4. Use header and META tags thoughtfully. The rotating slider should be integrated into your website's SEO as seamlessly as it visually appears on the front end.