Slides is a place for creating, presenting and sharing presentations. The Slides editor is available right in your browser. Unlike traditional presentation software, like PowerPoint, there's no need to download anything.
This is very nice when you are willing to write basically code for your presentation, but nothing beats https://slides.com in productivity. It is the SaaS of the creator of Reveal.JS. I usually just make a monthly subscription when I need to make a new presentation, otherwise you can keep everything, just can't create new presentations. Basically "pay when you use it", very fair business model, worth every penny!