Microsoft PowerPoint 2010 includes a powerful feature to instantly broadcast your PowerPoint 2010 live to a remote viewer anywhere around the world over the internet for free. The presentation shared over the web can be seen even if the viewer does not have PowerPoint installed, all they would need a web browser like Internet Explorer, Firefox, or Chrome.
To broadcast a Presentation over web :
Step 1: Open the presentation you want to broadcast.
Step 2: Navigate to File click Save & Send in the menu
Step 3: Select Broadcast Slide show from the Save & Send tab
Step 4: Click Broadcast Slide Show