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I'd like to show some descriptive text when the mouse hovers on a link:

<a class="foo" alt="Hello World" href="/index.html">Hello World</a>

Jason Is My Name
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Giuliano Malatesta
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    This question appears to be off-topic because it is about web development which is off-topic at Pro Webmasters. Web development questions may be asked at [so] but be sure to read their FAQ before posting to ensure your question meets their guidelines. In its current form, this question does not meet their guidelines. – John Conde Jan 22 '19 at 12:32

2 Answers2

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Go ahead and use the title attribute my friend!

<a href="#" title="hello universe!">Hello Everyone!</a>
Jason Is My Name
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What purpose do alt tags serve?

Search engines and other robots cannot interpret images, but images can play a crucial part in how people interpret a particular web page. Alt tags solve for this by providing text which is read by the search engines. When Googlebot or other search engine crawlers inspect a page, images with properly formatted alt text contribute to how the page is indexed and where it ranks.

Alt tags are also useful for users viewing a webpage on screen readers or browsers that can't process images.

Source: What is an alt tag, and how does it impact SEO?

But in your case you would like to use a href only for hyper link so use title tag only not alt tag.

<ul>
 <li><a class="navbar" title="culture" href="../cultura/index.html">Cultura</a></li>
</ul>

If you're going to use img src then use alt tag it'll be more helpful.

Alt text is contained within the image tag example: 

<img src="/demo/nike_air_zoom.png" alt="nike air zoom" title="nike air zoom" />
MrWhite
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Group Of Oceninfo
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  • Please quote your sources. However, since you're going into detail describing what the "alt tag" is, I think you should at least mention that it isn't actually a valid attribute on anchors. – MrWhite Jan 22 '19 at 17:59