SEO Plugin Performance Report for Q4 2021

In June of 2021 an SEO plugin for WordPress boasted they were “one of the fastest SEO plugins” available, so using the Query Monitor plugin, we tested the performance of several SEO plugins to see if their claim was true (spoiler alert, it wasn’t).

In the months since that article, there has been a new version of WordPress and new versions of several SEO plugins, so we were curious to see if the SEO plugin performance results had changed for Q4 2021. The WPSSO Core plugin, for example, has integrated their Schema JSON-LD add-on into their Core plugin, so the features of WPSSO Core have increased significantly – would it also affect its performance?

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How Fast Are WordPress SEO Plugins in 2021?

An SEO plugin recently boasted in their change log that they are now “one of the fastest SEO plugins“, which made us wonder – did they really measure their plugin performance before stating this, or is it just wishful thinking on their part? :-)

To see where this SEO plugin’s performance stood in contrast to others, we imported the WP Test data and installed the Query Monitor plugin on a WordPress test site, then proceeded to check the performance of the most popular SEO plugins. The only plugins active were the SEO plugin being tested and the Query Monitor plugin. The “Tiled Gallery” post from the WP Test data was used for testing since it contains both text and images (a featured image was selected and a post excerpt was also entered). After reloading the webpage a few times to prime the PHP opcode cache, the following performance results were noted. Green denotes plugins with the best performance, yellow with average performance, and red with poor performance (relative to each other).

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Is WPSSO the Best Alternative to Yoast SEO for 2021?

The Yoast SEO plugin is currently active on over 5 million sites, which means that its features are also limited by the most common and basic needs of those 5 million site owners — content creators and SEO experts often require more control and fine-tuning than Yoast SEO can deliver.

Before considering any Yoast SEO alternative or enhancement plugins, we should clarify what Search Engine Optimization (SEO) is, how a plugin like Yoast SEO helps, and how an alternative plugin like WPSSO Core and its add-ons differ from Yoast SEO.

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Google Shipping Details for WooCommerce Products

WPSSO + WooCommerce logos.

In September 2020, Google announced support for shipping details in Schema Product Offers and how shipping details would be presented in search results. Adding the new shippingDetails property to your Schema Product markup is especially important if you offer free or low-cost shipping, as this will make your products more appealing in search results.

WPSSO Core Premium can now retrieve shipping information for WooCommerce products, including shipping zones, methods, rates, and locations (continents, countries, states, and postal / zip codes). If you’re using postal / zip code wildcards or ranges for shipping, WPSSO Core Premium can also create the proper PostalCodeRangeSpecification markup suggested by Google.

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Google Schema for COVID-19 and More Free Features!

On March 17th 2020, in response to COVID-19 self-isolation trends, Google published new Schema Event properties for virtual, postponed, and cancelled events.

The latest Premium version of WPSSO Schema JSON-LD Markup provides several customization options for these new Schema Event properties in the Document SSO metabox.

This past month, the Free / Standard versions of WPSSO Core and its WPSSO Schema JSON-LD Markup add-on have also received several new features — most notably, almost all customization options in the Document SSO metabox are now available in the Free / Standard version of WPSSO Core (except those options that require an integration feature in the Premium version to implement, like the video service APIs), and the Free / Standard version of WPSSO Schema JSON-LD Markup now includes all 495 supported Schema types!

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[Solution] Sharper Thumbnails for Facebook, Google, Open Graph, Pinterest, Schema, SEO, Twitter, etc.

Pop quiz! Did you know?

1) WordPress creates thumbnails automatically?

WordPress uses the larger / full-size image you upload to create smaller thumbnail images (see your WordPress Settings > Media page for the complete list of sizes).

For example, a photo gallery page will show small thumbnails of the larger / full-size images you uploaded. Themes will often include the featured image you selected in a predefined image size and location in the webpage.

2) All images must be sharpened after resizing?

This is such a standard process that Photoshop, for example, automatically applies a default amount of sharpening when resizing any image — you must specifically uncheck an option in Photoshop to avoid sharpenning an image during the resize process!

3) WordPress does not sharpen resized images?

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[Solution] Google Reports Missing “Product Identifier” for WooCommerce Products

WPSSO + WooCommerce logos.

WooCommerce manages information on product Availability (aka Stock), Prices, SKU, etc., but additional WooCommerce product attributes must be created to provide more product information for Google.

The WPSSO Core Pro plugin (and its WPSSO Schema JSON-LD Markup Pro add-on), for example, include a variety of WooCommerce product attribute values in its Schema markup, including the product Brand, Color, Condition, EAN, GTIN-8, GTIN-12, GTIN-13, GTIN-14, ISBN, Material, MPN (aka Manufacturer Part Number), Size, and Gender.

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Why WordPress Image Sizes for Social Sharing and SEO?

All social and SEO plugins – except one that I know of – use the full size image URL from the WordPress media library when adding image meta tags to the webpage (ie. og:image, twitter:image, etc.), and/or adding images to Schema JSON-LD markup for the webpage. This can be problematic for several reasons…

  1. The image resolution may be too small.
  2. The image resolution may be too large and the file size too big.
  3. The aspect ratio (width or height) may exceed a maximum value.
  4. The image displayed on the social / search site is center cropped.

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