Modifying this control will update this page automatically
    
Hear a summary of a webpage
Hear how many headings, links, tables, landmarks, live regions, and more are on a webpage.
Note: VO represents the VoiceOver modifier.
- Press VO-Shift-I. - VoiceOver speaks statistics only for the types of items listed in the Rotor when viewing webpages. 
To set an option to have the summary automatically read when a webpage opens, open VoiceOver Utility (press VO-F8 when VoiceOver is on), click the Web category, then click Page Loading.