Using the exact same set every time — looks spammy and stops you reaching new audiences.

Only using huge, oversaturated tags — you get buried instantly. Mix in niche tags too.

Ignoring location-based tags — great for reaching nearby, ready-to-buy customers.

Cramming irrelevant tags in — this can hurt how the algorithm categorises your post.

Never reviewing what's working — check insights and lean into the tags that perform.

Treating hashtags as a strategy on their own — they're a small boost, not a replacement for a strong hook.