The practice of scheduling ads for certain times of the day & certain days of the week when the chances for conversions are higher. Advertisers can even increase or decrease the bids at different times.
For example, an advertiser knows that they get the lowest conversions between 11 a.m. to 2 p.m. on Tuesdays. Thus, they can choose not to show their ads during this period.
Day partings helps in targeting consumers at the right time & lowering overall advertising costs
Certain ad platforms like Google Ads have an automated day parting feature. However, for many social media advertising platforms, such as LinkedIn Ads, day parting must be done manually.