TikTok's bio is 80 characters. You get one link only once you cross 1,000 followers. Hashtags inside your bio are the main way TikTok search matches your profile to niche queries. And most business accounts don't use them.
The TikTok Creator Profile Audit checks eight signals against your public profile preview. Avatar. Bio length. Hashtags in bio. Link-in-bio (if unlocked). Handle format. Visible follower and like counts. Whether you've pinned videos for the cold-visitor flow.
The audit explicitly calls out the link-in-bio thing. You can't blame yourself for not having one at 400 followers, but you can (and should) add one the day you cross 1K. The generated AI prompt builds a post schedule aimed at that threshold if you're not there yet.
Context: Chapter 11 of The $20 Dollar Agency is the social methodology; Chapter 50 of The $100 Network, Social Distribution and Content Repurposing, covers how to turn one piece of content into cross-platform distribution without starting over on each.