JavaScript SEO is gaining more and more importance as part of technical SEO, considering the fact that website developers are now implementing JavaScript frameworks and libraries more and more in different contexts. It creates problems for search engines, in that they may fail to crawl and index content dynamically rendered through JavaScript. This can lead to poor visibility in search results and decreased organic traffic.

Thus, JavaScript SEO is all about ensuring that search engines can access and understand basic elements of a website, including its content, structure, and metadata. It can involve techniques like server-side rendering, pre-rendering, or dynamic rendering. It should also concentrate on improving the performance of JavaScript code, so that it can be crawled easily.

Thus, following best practices of JavaScript SEO will ensure that absolutely every implementation of a website is accessible to search engines. This supports higher rankings in search results and more organic traffic, as well as better overall website performance.