Advertisers start a campaign by

• Creating a new tweet message.
• Selecting a time slot between when the ad has to be posted
• bidding for the time slot.
• Allocating an amount for the campaign.
• Limiting the number of impressions per day.

Twitterers can start displaying ads by

• Signing up for a new twivert account.
• Limiting the number of tweets per day.
• By selecting the time slots between when the twitterer is comfortable with display ads.

Optionaly twitterers can pre-approve ads before they are tweeted.
Each time a tweet is published the corresponding twitterer is paid for the same.
Advertiser is charged only when the tweets are published.