The importance of an SEO-friendly website architecture involves the understanding of 'Website Crawlability' by search engine bots or spiders. A well-structured website enhances the user and search engine experiences, affecting where your site appears in search results. Key elements include having an HTML title tag, meta descriptions, metadata, and page redirection. They play a significant role in achieving SEO success. If you're using a CMS like WordPress, you can optimize your tags with plugins.

On-page optimization, also known as on-page SEO, refers to the activities conducted on a website to boost its visibility and rankings on search engine results pages (SERPs). These activities include content optimization, optimizing HTML codes, meta descriptions, and title tags. It helps improve the overall readability and click-through rate (CTR) of a site. Techniques include proper use of title tags, page titles, optimizing meta descriptions, content, URLs, images, using important HTML tags, creating internal and external links, and generating sitemaps.

SEO, or Search Engine Optimization, is a methodology that optimizes online content to rank higher on search engine results pages. By leveraging techniques that make websites noticeably relevant and in line with search queries, SEO boosts organic traffic. It plays a significant role in connecting businesses to their targeted audience since many people rely on search engines for information. However, search engine algorithms are constantly evolving, necessitating ongoing SEO adaptation. Despite these changes, a well-optimized website attracts quality traffic and increases visibility among billions of web pages.