Subject: Viewable Click-through Rate (vCTR) 18 general knowledge quiz questions. It should take around 4 minutes to complete all the questions.

Subject: Viewable Play Time 19 general knowledge quiz questions. It should take around 4 minutes to complete all the questions.

Subject: Bid for viewable ad impressions 19 general knowledge quiz questions. It should take around 4 minutes to complete all the questions.

Subject: Reviewable play 13 general knowledge quiz questions. It should take around 3 minutes to complete all the questions.

Subject: Viewable Cost Per Thousand Impressions 8 general knowledge quiz questions. It should take around 2 minutes to complete all the questions.

Subject: Viewable CPM 9 general knowledge quiz questions. It should take around 2 minutes to complete all the questions.

Subject: VCPM (Viewable cost per mille) 9 general knowledge quiz questions. It should take around 2 minutes to complete all the questions.

Subject: Viewable cost per impression (vCPM) 22 general knowledge quiz questions. It should take around 5 minutes to complete all the questions.

Subject: Viewable impressions percentage (VIP) 8 general knowledge quiz questions. It should take around 2 minutes to complete all the questions.

Subject: Viewable CPM (vCPM) 8 general knowledge quiz questions. It should take around 2 minutes to complete all the questions.

Subject: Cost per Viewable Thousand Impressions (vCPM) 8 general knowledge quiz questions. It should take around 2 minutes to complete all the questions.

Subject: Viewable impression rate (VIR) 14 general knowledge quiz questions. It should take around 3 minutes to complete all the questions.

Subject: Cost per Viewable Impression (CPVI) 8 general knowledge quiz questions. It should take around 2 minutes to complete all the questions.

Subject: Revenue per Viewable Impression (RPVI) 16 general knowledge quiz questions. It should take around 4 minutes to complete all the questions.

Subject: Ad viewability tracking technology 9 general knowledge quiz questions. It should take around 2 minutes to complete all the questions.

Subject: Ad viewability reporting 19 general knowledge quiz questions. It should take around 4 minutes to complete all the questions.