JavaScript SEO aims to make websites powered by JavaScript discoverable, crawlable, and indexable for search engines such as Google.
Crawling and indexing JavaScript-based websites are more complicated and resource-intensive for search engines. JavaScript SEO is a more advanced aspect of SEO, requiring technical knowledge and experience.
The main difference is that, unlike plain HTML sites, search engines must render the JavaScript-powered pages to see the actual content that JavaScript generates. This process is time-consuming and resource-intensive and has more potential for errors.
Check our detailed guide to learn more about JavaScript SEO:
JavaScript SEO: What You Need to Know