Correct JSON-LD Image Dimensions to Gain Featured Snippets Depending on the scenario, try to annotate your mark-up first with JSON-LD, unless the guidelines specify a different format as preferable. When using JSON-LD mark-up, image values without the use of quotation marks are “numbers”, whereas values expressed within quotation marks are “strings”. That means that a coder needs to be deliberate to avoid the quotation marks when a numeric value is the desired outcome. Prioritize images within your pillar evergreen content. Given that an article may have several images within it; this removes the guesswork out of the selection process for a search engine when displaying the article with an accompanying image snippet. Your article's featured image needs to be at least 1200px wide. A video thumbnail image file must be at least 160x90 pixels and at most 1920x1080 pixels. Its best to use images in .jpg, .png, or. gif formats. All image URLs should be crawlable and indexable before you can expect Google to display them on search results pages. Call 6511-206-2410 for optimal mobile image search results.