Core e-commerce and social media term. Xiaohongshu (小红书) is built around 种草 culture, users share product reviews that 'plant seeds' of desire. The opposite is 拔草 (pull out the grass = buy it or lose interest).
memory
Someone plants a seed (种草) of desire in your heart. It grows and grows until you either buy it (拔草, pull the grass) or the desire fades.