Get to know the three trial methods available on AppExchange: test drives, Trialforce trials, and sandbox trials. Compare trial methods to determine the one that best meets your needs.
Learn More:
Trailhead: AppExchange Basics - https://trailhead.salesforce.com/content/learn/modules/appexchange_basics
Trailhead: Salesforce Labs Basics - https://trailhead.salesforce.com/content/learn/modules/salesforce-labs-basics
Help: Sandboxes: Staging Environments for Customizing and Testing - https://help.salesforce.com/s/articleView?id=sf.deploy_sandboxes_parent.htm&type=5