Mumbai: 2021 has bounced back with a substantial double-digit spike, delivering an all-time high of 1824 million seconds of ad volumes during the year. This translated into a 22 per cent and 18 per cent growth over 2020 and 2019, respectively. The Top 10 advertisers accounted for 780 million seconds of ad volumes, and the next 40 accounted for 340 million seconds. The data was