Your sales dropped without obvious reason? Check if eBay or other platforms have technical issues here: Downdetector 

Convert text to other cases e.g. from ALL UPPER CASE to Capitalized Case: Convertcase

Increase SEO for your site and listings with backlinks, for free here: Pingler

There have been reports that you can decrease your chances to get your account suspended by Amazon if you use Amazon Smile. True or not, you can place an order from time to time just in case …  Amazon Smile!

Increase your Site’s SEO by helping the Google finding you by manually importing your URL to its index Here (you must sign in with a Google account)

Increase your eBay store’s SEO by manually setting related to your store keywords. Follow this eBay guide to walk you through.

UPC lookup Database: UPCitemdb