WordPress's SEO plugin ecosystem (Yoast, Rank Math, All In One SEO) is excellent at editorial workflow. Meta titles, descriptions, social cards, sitemap generation, focus keyword scoring. What it cannot do is fix the technical foundations: theme-level schema duplication, plugin-driven performance drag, hosting tier bottlenecks, content depth. Most WordPress SEO retainers we replace had Yoast installed, configured to a reasonable default, and called the technical SEO 'done'.
Real WordPress SEO requires writing PHP, auditing plugins for performance impact (every plugin loaded on every page costs something), and reading the hosting profile to identify whether server response time is the actual constraint. The work is not glamorous and it does not show on a ranking dashboard for the first 60 days, but the foundations are where the compound effect comes from. Get theme-level schema right once, and every page benefits forever. Prune ten unnecessary plugins, and CWV improves across the whole site permanently. Move off cheap shared hosting to managed WordPress hosting on Kinsta or Cloudways, and the conversation about CWV becomes about milliseconds, not seconds.
From month four onwards, the work converges with standard SEO: content production, on-page optimisation, internal linking, schema for new page types. But the foundations matter, and they require WordPress-specific eyes.