How, if possible, can a list of channels be set to a user's cookie and passed as a custom variable in Google Analytics?
For example, a user clicks on a paid ad on 1/1/2018 and the cookie sets channel to '1/1/2018: PPC'. The user then clicks on a facebook post on 1/5/2018 and cookie updates channel to '1/5/2018: Social; 1/1/2018 PPC'. User then searches on Google and clicks on organic link 1/21/2018 and cookie updates to '1/21/2018: SEO; 1/5/2018: Social; 1/1/2018 PPC'. Demandbase does this, but I can't afford them.
Is this possible? How can this be accomplished?
Would love to see an example.
