Here’s a snapshot of Snap Inc. that won’t disappear in a few seconds. The Snapchat phone app burst on the social media scene by allowing users to take photos and videos, attach messages, and send them to other users. The twist: The messages disappeared in a few seconds, unless the receiver captured them. Subsequent features allowed users to enhance their images, including stylized representations of their locations, and offered the capability to string their chats together into a story of their day. Snap, Snapchat’s parent, makes money by selling access to its users -- an average of about 160 million a day -- to advertisers. In 2017 Snap Inc. filed for an initial public stock offering.