In order to pass this test you must add an alt attribute to every <img> tag used into your webpage.

An image with an alternate text specified is inserted using the following HTML line:

<img src="image.png" alt="text_to_describe_your_image">

Remember that the point of alt text is to provide the same functional information that a visual user would see. Search engines, users who disabled images in their browsers and other agents who are unable to see the images on your webpage can read the alt attributes assigned to the image since they cannot view it.

Learn more about optimizing images for SEO.

In order to pass this test you must identify into your code all deprecated HTML tags listed above and replace them with proper tags or CSS rules. Some examples are given below:

• for <applet> tag, the equivalent tag is <object>
• for <center> tag, the alternative CSS property is text-align
• for <font> tag, the alternative CSS properties are font-family and font-size
• for <s>, <strike> and <u> tags, the alternative CSS property is text-decoration

In order to resolve this problem you are advised to:

• use gzip compression
• move all CSS style rules into a single, external and minified CSS file
• minify all JS files and, if possible, try combining them into a single external JS file
• use CSS layouts

<IfModule mod_expires.c>
    ExpiresActive on
 
    ExpiresByType image/jpg "access plus 1 month"
    ExpiresByType image/jpeg "access plus 1 month"
    ExpiresByType image/gif "access plus 1 month"
    ExpiresByType image/png "access plus 1 month"
</IfModule>

<IfModule mod_expires.c>
    ExpiresActive on
 
    ExpiresByType text/javascript "access plus 1 month"
    ExpiresByType application/javascript "access plus 1 month"
   </IfModule>

<IfModule mod_expires.c>
    ExpiresActive on
 
    ExpiresByType text/css "access plus 1 month"
 </IfModule>

In order to pass this test you must make your email addresses invisible to email spiders. Note that the best option is to replace your entire contact mechanism with a contact form and using the POST method while submitting the form.

Other solutions are listed below:

• replace the at (@) and dot (.) characters
• replace text with images
• use email obfuscators
• hide email addresses using JavaScript or CSS trick

In order to pass this test, you have to update each link identified in this report, by adding a rel="noopener" or a rel="noreferrer" attribute or both:

<a href="https://example.com" target="_blank" rel="noopener noreferrer">
	Click here
</a>

• rel="noopener" prevents the new page from being able to access the window.opener property and ensures it runs in a separate process.
• rel="noreferrer" has the same effect but also prevents the Referer header from being sent to the new page.

Creating a custom 404 error page can be relatively simple or more complicated, depending on what technologies were used to build your website (your web server, framework used, etc). Learn more about the basics of creating a custom 404 error page.

On your custom error page, you should provide relevant information to keep the user's attention so they remain on your website. Some steps to achieve this goal include:

• Adding links to your most important pages (your best articles articles/content, latest posts, etc.)
• If you have an e-commerce business, you can display special offers, product recommendations, discounts, etc.
• Include a search box or a sitemap link to help users find the information they wanted.
• Use simple language (non-technical) to explain what went wrong.
• Add a contact form or provide an email address to allow users to get in touch with you for further help.

You can also use your custom 404 error page to track the source of broken links in your site.