# Glossary of Terms

Concept | Definition |

Attempts | Number of times the Video SSP platform attempts to display an ad. |

Buying organization | Name of the platform (DSP/bidder) buying the impressions within the deal ID. |

Clicks | Number of clicks. |

Completion Rate (25%) | The number of ads that were viewed more than 25% divided by the total number of ad impressions. |

Completion Rate (50%) | The number of ads that were viewed more than 50% divided by the total number of ad impressions. |

Completion Rate (75%) | The number of ads that were viewed more than 75% divided by the total number of ad impressions. |

Completion Rate (100%) | The number of ads that were viewed more than 100% divided by the total number of ad impressions. |

CPM | Average revenue corresponding to a thousand ads. |

CTR | Click through rate, computed as clicks/impressions. |

Deal | A direct transaction arrangement between a seller and a buyer on the platform, usually created using a “Deal ID”. |

IAB Viewability | A ratio determined from the number of IAB viewable ad impressions divided by the number of IAB measurable ad impressions |

Impressions | Number of impressions sold. |

Revenue | Revenue driven by the impressions sold. |

Success Rate | The percentage of ad attempts that delivered an impression. The rate is derived from the number of impressions divided by the number of ad attempts. |