In the context of social media, archiving means creating an archive of your organization's posts, messages, and related metadata on social media. Basically, this means you need to record everything. In industries like healthcare and finance, this is often required for regulatory compliance.
A company's social media archive contains information about what was said when and in what context. It also shows how quickly customer messages are responded to. If necessary, this data can be used in a judicial disclosure or requested by regulatory authorities.