The snippet you provided refers to the attribute, which is a modern web optimization used in tags to improve page performance. What it Does
: It helps avoid "jank" (stuttering) while scrolling, though on very slow connections, it might mean the text appears slightly before the images pop in. Common Context: WordPress <img decoding="async" class="alignnone size-ful...
You likely saw this because adds this attribute to images by default to boost site speed automatically. The snippet you provided refers to the attribute,
: It tells the browser it can decode the image "off the main thread". though on very slow connections
