Today's digest looks at a new emissions measurement tool introduced by Channel 4, Bluesky enhancing referral tracking for publishers, and Perplexity AI's ambitions to raise funds.Channel 4 launches new emissions measurement toolAn advertising emissions measurement tool has been introduced [...]The post Digest: Channel 4 Launches Emissions Measurement Tool; Bluesky Enhances Referral Tracking for Publishers appeared first on ExchangeWire.com.