Analysis of critical issues on images with regard to weight, alt tag, image set and extension used.

Tab Images

Images are one of the resources that most populate websites and e-commerce sites to enhance and emphasize products or services. These elements are something that the Search Engine grants quite a lot of attention to and in the case of non-optimized management can be a very sore point for penalties in Serp.

Among the factors to be optimized, attention should be paid to:

  • Image weight: image weight could affect the loading time of the web page and could also affect the Crawling Budget. Being, by their nature, one of the largest elements (meaning “space occupied on the page”) of the html resource if not configured properly they could be penalized in terms of LCP (Core Web Vitals). The Seo spider considers Kilobytes as the unit of measurement.
  • Name of Images: an appropriate file name directs the Bot to proper indexing to database and inclusion in the serp dedicated to “images” also for related queries.
  • Alt Tag Management: this attribute performs a very important function because it allows the Spider to immediately understand the content of the image. This element, along with the filename and position in the text enables proper indexing in “Serp images” and safeguards the website from potential “soft penalization.” Alt attributes should specify relevant and descriptive alternative text about the purpose of an image and appear in the HTML source like the following example:

The image tab shows data on all images discovered during a scan. This includes both internal and external images, discovered via “img src” or “a href” tags . The alt attributes of images (often incorrectly referred to as “alt tags”) can be viewed by clicking on the URL of an image and then on the ‘Image Details’ tab of the lower window.

Decorative images should provide null (alt=””) and non-missing alt text so that they can be ignored by assistive technologies, such as screen readers.

The columns available are related to :

  • Address: the scanned URL.
  • Content: the content type of the image (jpeg, gif, png, etc.).
  • Size: image size in kilobytes. In the case of exporting image data the size uses bytes as a unit so it is necessary to divide by 1,024 to convert to kilobytes.
  • Indexability: whether the image URL is indexable or non-indexable.
  • Indexability Status: the reason why an image URL is not indexable, for example, if it was canonicalized to another URL or has the “noindex” tag.

Filters Card Images

The 4 available filters are very useful:

  • Over 100kb: shows images exceeding 100kb. Page speed is extremely important to users and SEO, and often large assets such as images are one of the most common problems in slowing down web pages. This filter simply acts as a rule of thumb to help identify images that are large enough in file size and may take longer to load. These should be considered for optimization, along with the opportunities identified in the PageSpeed tab that uses the PSI API and Lighthouse to verify speed.
    This can help identify images that have not been optimized in size, that load off screen, that are not optimized, etc. You can also customize this filter from “Config > Spider >Preferences” to define a threshold other than the 100 Kb set by default.
  • Missing Alt Text: images that have an alt attribute in the html code, but lack text. Click on the address (URL) of the image and then on the “Image Details” tab. Images should have alternative descriptive text optimized both for semantic and descriptive enhancement of the image itself and to aid screen readers used by the blind and visually impaired.
  • Missing Alt Attribute: images that completely lack an alt attribute.
  • Alt Text Over 100 Characters: includes images that have an “Alt Text” that exceeds 100 characters. I recommend that you avoid using serial keywords in this attribute and prefer semantically correct text with respect to the context in which the image is placed.

Analyzing Images

Seo Spider Tab