Where they come from
Search Console's 'queries' report where you rank 8-20 is a goldmine. These are zero-volume keywords your content already half-answers.
Dedicated answer pages
Build a single-intent page per long-tail cluster. 400 words, one clear answer, clean title tag. Rinse, repeat.
Compound traffic math
100 zero-volume keywords at 8 clicks/month each = 800 highly-qualified visits. That beats a single 10k-volume keyword at position 15 (which gets maybe 200 clicks).