stoxello

Stoxello SEO Toolkit gives site owners a focused set of search optimization controls for posts, pages, public custom post types, and site-wide SEO defaults.
Plugin page: https://stoxello.com/platforms/stoxello-seo-toolkit/
Features include:
<ul>
<li>Per-post SEO title and meta description fields.</li>
<li>Search preview and lightweight SEO checks in the editor.</li>
<li>Focus keyphrase checks for title and description coverage.</li>
<li>Canonical URL controls.</li>
<li>Per-post noindex and nofollow controls.</li>
<li>Open Graph and Twitter card output.</li>
<li>Organization, WebSite, WebPage, Article, BlogPosting, Product, SoftwareApplication, FAQPage, and breadcrumb JSON-LD output.</li>
<li>Site-wide defaults for organization name, logo, and social image.</li>
<li>XML sitemap at <code>/stoxello-seo-sitemap.xml</code>.</li>
<li>Automatic sitemap discovery in <code>robots.txt</code>.</li>
<li>Google and Bing webmaster verification tags.</li>
<li>Breadcrumb shortcode: <code>[stoxello_breadcrumbs]</code>.</li>
<li>WordPress media selector for the organization logo.</li>
<li>Title separator control.</li>
<li>Author and date archive noindex controls.</li>
<li>Attachment page redirects.</li>
<li>Optional taxonomy URLs in the XML sitemap.</li>
</ul>
All included features are available immediately in this WordPress.org plugin.

Stoxello SEO Toolkit

Focused SEO controls for WordPress content, social previews, schema, robots rules, canonicals, breadcrumbs, and sitemaps.

Claudio Di Totaro

<blockquote>
Modify or set the canonical URL and meta keywords in the Quick Edit interface of posts and pages.
</blockquote>
This plugin lets you modify or set the meta tags of the canonical URL and meta keywords in the Quick Edit interface of each post or page.
Why do I need to set the canonical URL? 
If you use a subdomain and point it to specific pages / posts then WordPress automatically sets the canonical URL to the main domain (usually www.), but for SEO and indexing reasons you may want to set the canonical URL to the subdomain instead.
Why do I need to set Meta Keywords? 
It helps Search Engines to index your content better, especially when you have important content which is generated automatically on the page and is not part of the HTML.
<h4>Basic Features</h4>
<ul>
<li>Go to Posts or Pages, click on Quick Edit and maintain Canonical URL or Keywords (multiple comma separated)</li>
</ul>
<h4>Support</h4>
To get your queries resolved related to ‘Custom Canonical URL and Keywords Modifier’, you can always take help from <a href="https://ditotaro.wordpress.com/ccuakm" rel="nofollow ugc">Support.</a>

Custom Canonical URL and Meta Keywords Modifier

Modify or set the canonical URL and meta keywords in the Quick Edit interface of posts and pages.

Stoxello SEO Toolkit vs Custom Canonical URL and Meta Keywords Modifier