Yoast SEO

Yoast manages metadata. It does not rank anything. That sentence is the whole assessment, and being clear about it prevents both of the common disappointments: expecting the plugin to produce traffic, and dismissing it because it does not.

What it genuinely gives you is a place for every piece of metadata a search engine reads, sensible defaults for all of it, and a hard-to-ignore prompt when something is missing.

What it manages

• Titles and meta descriptions, per page and as templates for post types and archives.
• Canonical tags, including control over which URL is canonical.
• Indexing control — noindex on archives, tags, attachment pages or anything else that should not compete.
• XML sitemaps, though WordPress core also generates these now.
• Structured data for articles, breadcrumbs, organisations and FAQs.
• Open Graph and Twitter card data for social previews.
• Breadcrumbs, if the theme supports them.

The single most valuable of these is often the least discussed: redirecting attachment pages and noindexing thin archives. Those quietly stop a site competing with itself, and they are set once.

The green lights

Yoast's most recognisable feature is its content analysis — the traffic lights for keyphrase use, readability and so on. It deserves a careful framing.

Useful as: a checklist that catches genuine omissions. A missing meta description, a keyphrase absent from the title, no internal links on a page, an image with no alt text — all worth knowing.

Not useful as: a target. The analysis cannot read your content or judge whether it answers the question. Writing to make the lights green produces keyphrase-stuffed sentences and short paragraphs where longer ones were right. A page with amber lights and genuinely good content beats the reverse every time.

Treat it as a reminder system. A green light is not a ranking and a red one is not a fault.

Free versus Premium

The free version covers the parts that matter: titles, descriptions, canonicals, indexing control, sitemaps and structured data. A site can be technically well-optimised on it indefinitely.

Premium adds:

• Redirect management, which is genuinely convenient — though a dedicated redirect plugin or server-level rules do the same job.
• Multiple keyphrases per page.
• Internal linking suggestions.
• Additional content insights and no adverts in the admin.

The honest position: buy Premium if the redirect manager and the workflow save you time, not because the free version is incomplete. The wider question of choosing between SEO plugins is covered in the WordPress SEO checklist.

The lock-in nobody thinks about

Metadata is stored in the plugin's own post meta. Another SEO plugin cannot read it, so switching means importing.

Most competitors ship a Yoast importer, and they generally work. Two cautions:

• Test the import on a staging copy first, with a backup, and spot-check pages afterwards.
• Redirects stored in Premium are a separate dataset. Losing them means losing every 301 you have accumulated, which is a real traffic loss — export them before switching.

This is why people stay on SEO plugins they have stopped liking. The cost is not the licence; it is the migration.

Never run two

Two SEO plugins emit two canonical tags, two sets of Open Graph data and sometimes two sitemaps. That is worse than having neither, and it happens most often when someone installs a new one without deactivating the old.

Deactivate the old plugin as part of the switch, not afterwards.

What it cannot do

Being explicit, because this is where expectations go wrong:

• It does not write content anyone wants to read.
• It does not earn links.
• It does not make a slow site fast — that is how to speed up a WordPress site and Core Web Vitals.
• It does not fix a site structure where nothing links to anything.
• It does not get pages indexed on its own — see site not showing in Google.
• It does not audit your actual search performance; that is a search console's job.

Performance

An SEO plugin runs mostly in the admin, which is where its weight lands. Yoast is not light in the editor, and on a slow machine the analysis panel is noticeable. On the front end the output is metadata — a few tags — which costs visitors essentially nothing.

If the admin feels sluggish, the analysis panel can be disabled per user, and how to speed up the WordPress admin covers the wider question.

Common mistakes

• Writing to satisfy the traffic lights.
• Running two SEO plugins.
• Leaving default title templates, so every page shares one generic pattern.
• Switching plugins without exporting redirects.
• Assuming the plugin submits your site anywhere. It does not.
• Treating the sitemap as the reason a page is not indexed, when the cause is usually the content or an accidental noindex.

Deciding

If you want one plugin to manage metadata and stop you leaving obvious gaps, Yoast does that well and the free version is sufficient for most sites. Choose it, or a competitor, on the workflow you prefer and the quality of its importer — because the importer is the thing you will need if you ever change your mind.