For content added via JavaScript, search engines need to complete an additional stage called rendering, after which content can be indexed and ranked.
If a website has content added via JavaScript, the additional stage that search engines need to complete is rendering. This is because traditional search engine crawlers may have difficulty accessing and understanding dynamically generated content without executing JavaScript. In the process of rendering, the search engine's crawlers execute the JavaScript on the page, which allows them to see the content as a user would. After rendering, the content can then be indexed and eventually ranked. These steps are critical for ensuring that the content can be found and appropriately listed in search results.