What each channel captures
LSA captures the prospect who has decided to act, opens Google, types 'plumber near me' or '24 hour electrician', and calls the first credible-looking listing at the top of the page. This is the highest-intent segment but typically also the smallest in absolute volume.
Local SEO (Map Pack and organic ranking) captures a much larger pool: research-stage prospects comparing 3–5 providers, brand-aware prospects searching for your business by name, and informational searches that build awareness for future need. The conversion windows are longer but the total volume is materially larger.
Why running both works
The two channels compound. A prospect might first encounter your brand in an organic blog post, see your Map Pack listing on a later search, then click your LSA when they're ready to act. Each touchpoint reinforces the others. Removing any one of them tends to reduce total conversion by more than the standalone contribution of the removed channel.
Operationally the channels share infrastructure: Google Business Profile reviews influence both Map Pack ranking and LSA ranking; response time discipline helps both LSA performance and customer satisfaction; on-site content quality supports both organic ranking and LSA review-request workflows.
When to prioritise one over the other
Newer businesses with under 10 reviews typically can't rank top-3 in LSA regardless of bid — the review threshold is real. Investing in SEO and review-building first, then layering LSA once the review base is built, usually produces better ROI than running LSA from day one with thin reviews.
Established businesses with strong review counts and reliable phone coverage should run both. The order of incremental investment depends on capacity: if you can handle more calls today, LSA produces faster lead flow than SEO; if your conversion infrastructure is the bottleneck, fix that before adding LSA spend.