NEW YORK – Facebook is updating its data use policy in an attempt to give people more clarity on how the company uses information they share.

As part of the changes, Facebook is also signaling that it may start showing people ads on sites other than Facebook, targeting the pitches to interests that users express on Facebook.

The move comes a week before Facebook Inc.’s expected initial public offering of stock. Facebook held events with potential investors last week, and it has posted a version of its road show online.

The offering could value Facebook at nearly $100 billion — more than Kraft, Ford and other major brands.

The policy changes are in response to an audit by Irish data-protection authorities last year, Facebook said Friday. The commission had asked Facebook to be more transparent about how it collects people’s data and uses it for advertising, as well as how long it keeps such information.