This script performs an advanced SEO analysis on a specified website URL using Beautiful Soup for parsing HTML content. It evaluates various SEO factors such as title length, number of headings, presence and content of meta description and robots meta tags, canonical link existence, text-to-HTML ratio, keyword density (with an example keyword), mobile friendliness based on viewport meta tag presence, and link health including total links, nofollow links, external, and internal links. The results are returned in a dictionary format, providing a comprehensive overview of the website's SEO performance.