5 Best Practices for the Sign-up Flow (with examples!)
Briefly

In case the product requires additional information besides an email and a password, split the sign-up flow into several steps.
Social login methods make the sign-up process quicker and easier. When users sign up using social login, other essential information such as name and email can be retrieved automatically.
Display instructions near the password input field to help users create a password, and provide instant feedback as users type.
When a user enters something incorrectly in an input field or misses a required field, the error message should indicate where the error occurred and how to resolve it.
Read at Medium
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