Google Published a Post on Best Practices for Black Friday and Cyber Monday Pages

Nothing that seasoned SEO might not already know but if you re new to the game it’s worth a quick scan. HEre is a copy pate of their recommendation.

• Create the page early. Make sure you create the page well before the sale so Googlebot has time to discover and index the page. Make sure you are not blocking Google from crawling the URL (the Google URL Inspection Tool can be used to check this).
• Follow standard SEO best practices. A list of SEO best practices for landing pages can be found in our Search Engine Optimization (SEO) Starter Guide.
• Link to the landing pages from your home page (or similar) to increase their prominence, helping users (and Google) find the landing page quicker.
• Use a recurring URL, not a new URL for each occurrence of the event. Give the landing page of recurring events a meaningful URL that reflects the event that is used each year (for example: use /sale/black-friday, not /sale/2020/black-friday).
• Include a relevant, high quality image. Provide a static image with an up-to-date representation of your sale. Trim any whitespace around the borders of the image, and ensure that the image is visually engaging and is of good quality. For additional guidance on image quality, review the Google Images best practices and Images Web Fundamentals.
• Get your page recrawled. After you’ve tested your structured data for validity, ask Google to recrawl your page to get your content updated more quickly. (Note: as of publication this tool is undergoing maintenance, but we hope to have it up-and-running again soon.)