How does a Google video campaign with a 'brand awareness and reach' campaign goal benefit from target cost-per-thousand impressions (tCPM) being selected as the optimal bidding strategy? 

• By optimising bids to put the campaign's message in front of as many relevant people as possible. 
• By acquiring as many clicks as possible according to the daily budget that's been set. 
• By creating as many impressions as possible in line with the target cost-per-acquisition. 
• By analysing historical feedback and making adjustments to bids based on performance signals. 

Answer: By optimising bids to put the campaign's message in front of as many relevant people as possible.