Mobile messaging service WhatsApp Inc. announced Aug. 25 that under its updated privacy policy it will automatically share certain consumer data with its parent company Facebook Inc. unless a user specifically objects.

WhatsApp said that the company won’t share consumer phone numbers with advertisers and other users on Facebook. If users agree to the updated privacy policy, they will have the option over 30 days to opt out of having their WhatsApp information used for things like friend suggestions and other features on Facebook.

Edward J. McAndrew, privacy and data security partner at Ballard Spahr LLP said that the privacy policy change is the first step in how Facebook will monetize the WhatsApp subscriber database. The change will ‘‘enable Facebook and its corporate family, such as Instagram Inc., to improve services and make more money’’ off targeted advertising, he said. The data and metadata that WhatsApp will send to Facebook ‘‘is the end all be all for the technology sector,’’ McAndrew said.