The 2021 holiday shopping season is slated to be one of the largest ever, and the consumer shopping behaviors that were altered dramatically in 2020 continue to gain momentum this year.In a recent report, North America-based marketing technology solutions provider Snipp Interactive spotlighted successful case studies and three trends brand marketers should consider when planning their holiday promotional strategies. Some highlights:53% of marketers plan to start holiday shopping campaigns even earlier than last year.Online holiday season retail sales grew 32.5% in 2020 from 2019, and are expected to grow another 11.3% this year.3D or 360° product images increase conversion rates up to 250%.Download the report at right.