Sharing PowerPoint slides is an effective way to get your ideas across, and make your presentation memorable by focusing on bulleted items and avoiding too many details. Use the meeting controls such as annotation tools, presenter notes, and switching presenters, to help you during your presentation.

https://support.microsoft.com/en-us/office/present-powerpoint-slides-in-a-skype-for-business-meeting-73530b72-ef52-4845-8145-0d72fde94cd0?ui=en-us&rs=en-us&ad=us