How to Add Help Text in Salesforce

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This is the most common way to provide context and guidance for users when interacting with specific fields on a record. Here's how to do it:

1. Go to Setup > Object Manager.
2. Select the object where you want to add the help text (e.g., Contact, Opportunity).
3. Click on Fields and Relationship in the left pane.
4. Click on the field you want to add help text to. (Ex Website)
5. And, click on Edit. 
6. In the edit field view, locate the Help Text field.
7. Enter your desired help text. You can use up to 510 characters.
8. Click Save.

This help text will appear as a small information icon (i) next to the field on the detail or edit page. When users hover over the icon, the help text will be displayed in a tooltip.