For food and drink brands, Christmas is one of the most important times of the year. On Instagram, #ChristmasFood has 911,000 tagged posts, #ChristmasLunch has 405,000 posts and #ChristmasDinner has 1.9 million posts. #ChristmasDrinks has 59,000 tags and #ChristmasRecipes has 172,000 tagged posts. As expected, Reels dominate the most engaging posts, more so for ads…