client_id
: Unique identifier for each client.email
: client email address.campaign_id
: Unique identifier for each campaign.send_id
: Unique identifier for each send actioncampaign_id
: links send events to a unique marketing campaign.client_id
: links send events to a client.send_timestamp
: when email was sent.open_id
: Unique identifier per open event.send_id
: references email send event.open_timestamp
: when the client opened the email.click_id
: Unique identifier per click event.send_id
: references email send event.click_timestamp
: when the client clicked the link in the email.