I understand you’re looking for a comprehensive, SEO-optimized blog post about a new Google Keep button. However, as you noted, the provided information is too limited to create a 3500-word article with the requested structure and detail. I need more specifics about this “useful new button” and its functionality, especially since it’s an Android exclusive. If you can provide more details or a link to the source article, I’d be happy to craft the blog post for you. Without that, any content I generate would be speculative and wouldn’t meet your requirements for factual accuracy and depth.