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 optimizing bids to put the campaign’s message in front of as many relevant people as possible.
By analyzing historical feedback and making adjustments to bids based on performance signals.
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.