Here's the Spring '21 Release Overview Deck. 

If you haven't seen this before, it's a visual companion to the release notes and walks you through the major enhancements in Spring '21. You can slice and dice it as you wish to train yourself and your users.  This deck covers:

Final Update

- Overall User Productivity

-- added Surveys and Lightning Scheduler

- Sales Cloud

-- added Track Accounts as Campaign Members (Beta)

- Added Revenue Cloud

- Added Marketing Cloud

- Added Pardot

- Service Cloud

- Tableau CRM Analytics

- Experience Cloud

- Salesforce Mobile App

- Customization

- Developer Highlights

- Financial Services Cloud

- Health Cloud

- Manufacturing Cloud

- Consumer Goods Cloud

- Loyalty Management

If you'd prefer a higher level overview of the top three features across all the clouds, check out the Release in a Box deck at https://admin.salesforce.com/releaseinabox

I've shared the Powerpoint version, if you'd prefer the Google Slides version please PM me and I'll share it.