Use the same account next time to pick up where you left off.
|Production Salesforce account||Developer Edition or Admin Playground|
|Do I need to be a Salesforce customer?||Yes||No (It's free!)|
|Can I use it to create my Trailhead profile and store my badges?||Yes||Yes|
|Can I use it to complete Trailhead challenges?||No (except for multiple choices quizzes)||Yes|
|Can I keep my Trailhead badges if I leave my company?||No||Yes (use a personal email address)|
Salesforce has two different user interfaces: Lightning Experience and Salesforce Classic. It’s easy to switch between the two. You can learn about switching between interfaces, enabling Lightning Experience, and more in the Lightning Experience Basics module here on Trailhead.
This module is designed for Salesforce Classic.
Here are some tips: