SEO stands for Search Engine Optimization. See a general description in Wikipedia’s article or search for more details starting with Google’s Search Engine Optimization Starter Guide about SEO.

Search Engine Optimization

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Testing

Use these links:

• Structured data testing tool
• Rich Results Test
• Facebook Sharing Debugger

SEO Person

All fields are required if not specified otherwise.

• name
• url
• recommended jobTitle
• recommended alumniOf
• recommended gender
• recommended sameAs
• image link to an image

Specificy sameAs like:

samesAs = "link1", "link2", .... "linkN"

SEO SoftwareSourceCode

All fields are required if not specified otherwise.

• name
• codeRepository is a link
• codeSampleType: full (compile ready) solution, code snippet, inline code, scripts, template
• programmingLanguage
• runtimePlatform: runtime platform or script interpreter dependencies

SEO Product

All fields are required if not specified otherwise.

• name
• image link to an image
• description
• recommended mpn of type text
• recommended sku of type text
• brand of type text
• url
• offer-availability (offers.availability) of type ItemAvailability
• offer-price (offers.price)
• offer-currency (offers.priceCurrency) three-letter, ISO4217 format
• recommended offer-url
• recommended offer-priceValidUntil

Note: Google’s Product requires review or aggregateRating or offers.

If offer-* are not declared those will be completed as:

• offer-availability: LimitedAvailability
• offer-price: 1000
• offer-currency: BTC
• offer-url will not be included
• offer-priceValidUntil will not be included

SEO Post

SEO Post Description

It is used in:

• og-article.html, property og:description
• seo-ldjson-article.html, json field description

and built using the following code:

{%- if page.description -%}
  {%- assign xDesc = page.description -%}
{%- else -%}
  {%- if post.content contains '<!--more-->' -%}
    {%- assign xDesc = page.content | split: '<!--more-->' | first | markdownify | strip_html -%}
  {%- else -%}
    {% assign max-len = site.post-excerpt-maxlen | default: 50 %}
    {%- assign xDesc = page.content | markdownify | strip_html | strip_newlines | truncatewords: max-len -%}
  {%- endif -%}
{%- endif -%}

{%- if site.use-headline -%}
  {%- if page.headline -%}
    {%- assign xDesc = page.headline | append: " " | append: xDesc -%}
  {%- endif -%}
{%- endif -%}

{%- assign xDesc = xDesc | truncate: 160 -%}

SEO Post Images

An image is required according to Google’s docs for structured data for:

• site logo;
• publisher logo;
• company logo;
• every article.

Logo requirements:

• minimum size, width * height, 600 x 60 px;
• .jpg, .png, or. gif format;
• the text in word-based logos should be at most 48px tall and centered vertically within the 60px image height;
• logos with a solid background should include 6px minimum padding around the graphic.

Image requirements:

• type .jpg, .png, or .gif;
• minimum width of 1200px;
• for best results, multiple high-resolution images (minimum of 800,000 pixels when multiplying width and height) with the following aspect ratios: 16x9, 4x3, and 1x1.

the minimum sizes are:

• 1200 x 1200 px;
• 1200 x 900 px;
• 1200 x 675 px.

According to Facebook’s Images in Link Shares, for image size the preferred sizes are:

• 1200 x 630 px;
• 600 x 315 px;
• at least, keep the 1.91:1 aspect ratio.