What term describes any social media activity without a paid promotion?

The term that describes any social media activity without a paid promotion is "Organic." This concept refers to the natural engagement and interactions that occur on social media platforms without the use of paid ads or sponsored content. Organic posts typically consist of content shared by users, including images, videos, text updates, and comments that gain traction through followers, their networks, and engagement rather than through promotional spending.

For instance, when a brand posts an update on their social media page and their followers interact with it by liking, commenting, or sharing, this is considered organic reach. It relies on the audience's genuine interest and interactions, thus forming a community around the brand.

In contrast, other terms like "Paid" indicate activities involving payment to promote content. "Commercial" typically relates to business-oriented activities that may include paid promotions and advertisements. "Influencer" refers to individuals with large followings who may promote products or brands, often through paid partnerships, but does not exclusively represent the nature of the activity itself. Therefore, "Organic" is the most accurate term for the concept described in the question.