Master Guide: How to Add a Comment in HTML Explained

how to add a comment in html

As a web developer or designer, you know that HTML (Hypertext Markup Language) is the foundation of any website. It is the markup language that gives structure to online content, and its proper use is essential for creating a website that is functional and user-friendly. One element of HTML that is often overlooked is the HTML comment. In this article, I’ll explain how to add a comment in HTML, discuss the importance of commenting in HTML for SEO, and provide some best practices for using comments effectively in your web projects.

Key Takeaways

  • HTML comments are important for developers to leave notes for themselves and others who may work on the code in the future.
  • HTML comments help search engines understand the content of your website and can improve your SEO rankings.
  • The HTML comment syntax involves using the tags to surround the comment text.
  • When adding comments to HTML, it’s important to follow some best practices to ensure that your code is clean and easy to read.

Understanding HTML Comment Syntax

HTML comments are a great way to add notes to your code that are not displayed on the website. HTML comment syntax consists of the tag <!--, followed by the comment text, and ending with the tag -->.

Here’s an example of HTML comment syntax:

Code Result
<!-- This is a comment --> No visible output on the website

It’s important to note that HTML comments should only be used for code-related notes and not as a way to hide text from users or search engines. This is considered black hat SEO and is a violation of Google’s guidelines.

When using HTML comments, it’s also important to follow best practices to ensure your code remains clean and readable. One best practice is to write comments that are concise and to the point, avoiding unnecessary details or explanations. Another best practice is to place comments on a separate line from your code, making it easier to read and understand.

Overall, understanding HTML comment syntax and using it effectively can greatly improve the readability and maintainability of your code.

Adding Comments Using the HTML Comment Tag

Now that you understand the syntax of an HTML comment, let’s see how to utilize the HTML comment tag to add comments in HTML code. The HTML comment tag, which is <!-- -->, permits us to insert comments in the code, which will not be displayed when the page is rendered on the browser.

To add a comment, start with <!--, followed by the comment text, and end with -->. Here’s an example:

<!-- This is a comment -->

You can also add comments to specific sections of your HTML code. For instance, to add a comment to a section of code that specifies the header, use this format:

<!-- Header section begins -->

Tip: Adding comments to your code can help you understand it better when you revisit the code later or when you collaborate with other developers on a project. Commenting your code will make it easier to edit and debug your code in the future.

Moreover, adding comments in your code can aid with SEO. Google’s crawlers can read HTML comments, which implies that they can influence how search engines index your website. Therefore, if you add remarks to parts of your code that relate to keywords, you can optimize your content for SEO.

For example, if you have a web page about healthy diets, you might add a comment like this:

<!-- Keywords: Healthy Diets, Nutrition, Fitness -->

By including these keywords as comments, you are providing additional information to the crawlers, which can help your website rank higher in search engine results pages.

Adding Comments to CSS and JavaScript Code

The HTML comment tag can also be used to insert comments in CSS and JavaScript code. To add comments to CSS code, use the /* */ symbol, as shown below:

/* This is a comment */

For JavaScript code, use the // symbol to insert a single-line comment or /* */ to add multi-line comments, as shown below:

// This is a single-line comment


This is a

Multi-line Comment


Adding comments to your codebase is a valuable habit to cultivate because it can aid in better understanding your code and optimizing your content for SEO. So why not give it a try the next time you’re coding?

HTML Comment Syntax Guidelines

When adding comments to your HTML code, it is important to follow certain guidelines to ensure that your code remains well-structured and easy to understand. Here are some HTML comment syntax guidelines to keep in mind:

1. Use descriptive comments

When adding comments to your HTML code, it is important to use descriptive comments that clearly explain what the code is doing. This will make it much easier for other developers to understand your code and make any necessary changes.

2. Keep comments concise

While it is important to use descriptive comments, it is also important to keep them concise. Long comments can be difficult to read and may make your code harder to understand. Try to keep your comments short and to the point.

3. Place comments in the appropriate location

Comments should be placed in the appropriate location in your HTML code. For example, if you are commenting on a specific section of code, the comment should be placed directly above that section. This will make it much easier for other developers to find and understand the comment.

4. Avoid over-commenting

While comments are important, it is also possible to over-comment your code. If your code is relatively simple and easy to understand, you may not need to add many comments. Use your discretion and only add comments where they are truly necessary.

Example: <!– This code adds a navigation bar to the top of the page –>
  <li><a href=”#”>Home</a></li>
  <li><a href=”#”>About</a></li>

Following these HTML comment syntax guidelines will help you create well-structured, easy-to-read code that is easy for other developers to understand and modify.


In conclusion, adding comments in HTML is an essential skill for every web developer. Understanding the HTML comment syntax and the HTML comment tag is crucial for adding comments to your code. By using appropriate commenting in HTML for SEO, you can improve your website’s visibility and make it more accessible to search engines.

Remember, HTML comment syntax guidelines should be followed to ensure that your comments are well-structured and easily understandable. By following these guidelines, you can make your HTML code more readable and maintainable. With these tips, you are now ready to add comments in your HTML code easily and effectively. So, what are you waiting for? Start commenting in your HTML code today!


Q: What is HTML?

A: HTML stands for Hypertext Markup Language. It is the standard markup language used for creating web pages and applications.

Q: How do I add a comment in HTML?

A: To add a comment in HTML, you can use the syntax. Anything between the opening tags will be considered a comment and will not be displayed on the webpage.

Q: Why should I add comments in HTML code?

A: Adding comments in your HTML code can be helpful for yourself or other developers who work on the same project. Comments can provide explanations, instructions, or reminders about specific sections of the code, making it easier to understand and maintain.

Q: Can I use HTML comments for SEO purposes?

A: No, HTML comments are not visible to users on the webpage and do not contribute to SEO. Search engines do not index or consider comments as part of the page content. It is best to use other SEO techniques to optimize your website.

Q: Are there any guidelines for using HTML comment syntax?

A: Yes, when using HTML comment syntax, it’s important to properly format your comments and avoid using them excessively. Comments should be concise and relevant to the code they are placed within. Including excessive comments can clutter the code and make it harder to read.

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