WhatsApp today introduced Channels, a feed-style one-way broadcast service coming to the popular chat platform where admins can send text, photos, videos, stickers, and polls to followers. WhatsApp calls Channels "a simple, reliable, and private way to receive important updates from people and organizations," and cites hobbies, sports teams, and updates from local authorities as examples. The personal information of admins is kept hidden from followers, so things like phone number and photo profile aren't shown. Likewise, following a channel won't reveal your phone number to the admin or other followers. Admins will also have the option to block screenshots and forwards from their channel. WhatsApp says it is building a directory where channels can be discovered, and you can…