Install the web part from Microsoft AppSource.

Activating Licence

See this post on how to activate the licence.

After installation

Add webpart to a modern page and configure the following Web Part properties in the Web Part Property Pane section as needed:

• Title: Enter the name you want to give to the web part.
• OData Filter: Use this field to refine the users that are included in the spotlight rotation. The following OData properties are supported
  

  Created Department EMail FirstName JobTitle

  LastName MobilePhone Modified Notes Office

  OtherMail Title UserName WorkPhone

  Example: To show only a particular user you can use EMail eq 'userEamail@domain.com'
You can learn more about OData filter here.

• Design Template: Enter any of the following desired User Profile properties enclosed in curly braces. You can specify HTML tags and CSS styles to format your text.
  

  AboutMe Birthday CellPhone Department DisplayName Email

  FirstName HireDate Interests JobTitle LastName PastProjects

  Manager Office PictureUrl School Skills WorkPhone

  Example:

  <strong>{DisplayName}</strong>
<p style='margin-top:5px;margin-bottom:5px'>{JobTitle} - {Department}</p>
{AboutMe}
<div style='padding:5px;margin-top:5px'>
<strong>Office Phone:</strong> {WorkPhone}<br>
<strong>Cell Phone:</strong> {CellPhone}
</div>
• Text Layout: Specify how text is wrapped around the profile picture. – Wrap – Right      
• Background Color: Select the background color.
• Show new user every: How often should web part rotate user. – “On page refresh” a new user is displayed every time the page is refresh – “Daily” displays a new user every day – “Weekly” displays a new user every week. New user is selected every Monday
• Hide web part when no user is found: Indicate if web part should be hidden when no user is found based on your OData filter.