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The Ultimate Guide to JavaScript SEO


If you are looking for SEO techniques that will make your website stand out from the crowd, read this article to have better understanding basic information about JavaScript and how does it affect SEO.

What is JavaScript?

JavaScript, often abbreviated as JS, is a programming language that conforms to the ECMAScript specification. What is JavaScript?

JavaScript was initially created to “make web pages alive”. JavaScript has the unique ability to dynamically update the content of a page. You can build a website using HTML and CSS, but to add dynamic to it people use JavaScript. To summarize we use HTML for content creation, CSS for the look and Java for interactivity.

The programs in this language are called scripts. They can be written right in a web page’s HTML and run automatically as the page loads. Scripts are provided and executed as plain text. They don’t need special preparation or compilation to run. In this aspect, JavaScript is very different from another language called Java.

JavaScript is extremely popular language, for example such platform like FOREX and CFD trading platforms use JavaScript to continually update the exchange rates in real-time.

A lot of websites use JavaScript to add interactivity and to improve user experience. Some use it for menus, pulling in products or prices, content from multiple sources. The function of JavaScript are unlimited.


How to apply it to boost SEO?

Google can index JavaScript content on some websites much better than others which means that you have to work on its optimization in order to boost SEO. The goal is to make JavaScript-heavy websites easy to crawl and index, as well as search-friendly.

Google Search runs JavaScript with an evergreen version of Chromium, and there are some things you can optimize to make SEO better. You basically need to know how Google handles JavaScript and how to troubleshoot issues. Java can be heavy on page load and performance so you can optimize it.

Another thing you need to work is On-page SEO. All the normal on-page SEO rules for content, title tags, meta descriptions, alt attributes, meta robot tags, etc. still apply.

To optimize SEO, allow crawling for google robots, check duplicate content to avoid these issues.

Titles and snippets

Use JavaScript to set or change the meta description as well as the title because descriptive titles and helpful meta descriptions help users to find their searches.

HTTP status codes

I recommend using a meaningful status code to tell Googlebot if a page should not be crawled or indexed, like a 404 for a page that could not be found or a 401 code for pages behind a login.

Use structured data

When using structured data on your pages, you can use JavaScript to generate the required JSON-LD and inject it into the page. Make sure to test your implementation to avoid issues.

Images optimization

Images can be quite difficult on bandwidth and performance. I advise to use lazy-loading to only load images when the user is about to see them.

JavaScript SEO may seem difficult at first, but if you apply all these tips, I am sure you can improve a lot your website performance Do you have any ideas about improving SEO with JavaScript? Share it in the comments below! If you have your question, please write it below, I would be glad to answer your questions or to introduce your project to my team at Astorts Group  to be evaluated.

Alessandro Rocco Pietrocola is an entrepreneur and investor based in London and operating mainly in Europe, Asia and Oceania with main focus on UK, Baltic Countries, Russia, China, Hong Kong, Malaysia, Singapore, Middle East and New Zealand as area of interest! At the moment is the CEO of Astorts Group. He is an UK FCA (Financial Conduct Authority) Approved Person and is has great experience as director of regulated companies. He uses to dedicate part of his life to inspire others and help them achieve the most out of their life. Since he was 20, he had successfully founded and managed several companies operating in the field of management consulting, wealth management and fintech. He loves travelling, he is a cigars lover, an amateur golfer and a dapper man.


Please write me an email with your specific case or book a Skype call, my team and I will be more than happy to help you to find the best solution for your business need or to advice and support you to start the new business venture.

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