2026-09-21 UTC
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[social] Categories are more established and you select from them (you can add, edit, and curate them) but are aimed at having a set list. Categories are aimed at being a means to find similar posts (things shared) in your own site. Tags are more ad hoc and as a site grows you likely want to move toward a category approach. But, tags also are hooks from not only within the site, but can be used to aggregate from beyond your site as well.