TikTok Ads Targeting: Interests vs Hashtags vs Behaviors (2026)

On Facebook, you target "Yoga Interest." On TikTok, that is too vague. The algorithm moves too fast. You want to target people who watched a Yoga video yesterday. That is Behavior Targeting.

In this "Mega-Authority" guide, we cover:

1. Video Interactions: The strongest signal.
2. Hashtag Targeting: The SEO approach.
3. Creator Interaction: Stealing followers.
4. Broad Targeting: The ultimate end-game.

Part 1: Behavior (Video Interactions)

Settings:

• Audience -> Video Interactions.
• "Watched to end" OR "Liked" OR "Commented".
• Category: "Beauty & Personal Care".
• Timeframe: Last 7 Days.

Why it wins: It captures Recency. Someone who liked a beauty video 7 days ago is in the market now.

Part 2: Hashtag Targeting

You can enter specific hashtags.

• #booktok, #smallbusinesscheck, #gymrats.
• This is very precise.
• Strategy: Combine 10-20 relevant hashtags into one Ad Group.

Part 3: Creator Interactions

You can target people who follow specific "Types" of creators.

• "Followers of Comedy Creators."
• Unfortunately, you cannot target followers of specific accounts (e.g., "Target @Competitor followers"). That feature doesn't exist yet.

Part 4: Broad (No Targeting)

TikTok's algorithm is insanely smart at Content-Graph matching. If you have a great video about "Dog Training," and you run it Broad (No targeting), TikTok will show it to dog lovers within 2 hours.

• Condition: You need strong creative.
• Condition: You need pixel data (50+ conversions).

Part 5: Summary & Checklist

Your Action Plan:

1. Test 1: Behavior Targeting (Last 7 Days).
2. Test 2: Hashtag Stacking.
3. Test 3: Broad (Only Age/Gender/Geo).
4. Avoid: Generic "Interests" unless the audience size is huge.

Let the content find the audience.