Why is it not recommended to use <div> and <span> for all page content?
Using <div> and <span> for all content is not recommended because these tags carry no meaning: they don't tell the browser, the search engine, or assistive technologies what is actually inside.
1. Lack of semantics
<div> and <span> are technical containers:
<div>is block-level,<span>is inline. They say nothing about the content: it could be a menu, an article, or a comment. The search engine has to guess what each block means.
Example (bad markup):
<div>
<div>Home</div>
<div>Contacts</div>
</div>The search engine sees just a set of blocks, with no meaning.
2. Loss of structure and accessibility
Screen-reading software used by blind users
won't be able to tell where the heading is, where the navigation is, where the main text is.
Everything sounds like "block, block, block...".
Semantic tags (<header>, <nav>, <main>, <footer>)
help convey the structure of the page.
3. SEO problems
Without semantics, the search engine cannot precisely determine which part of the page is important. The result is worse ranking and incorrect indexing of content.
4. Difficulty of maintenance and styling
When everything is marked up with <div> and <span>, the code becomes hard to read:
it's difficult to tell where the menu is, where the footer is, where the content is.
Semantic tags make HTML logical and self-documenting.
Example (correct markup):
<header>...</header>
<nav>...</nav>
<main>...</main>
<footer>...</footer>5. Compatibility with future technologies
Semantic structure helps AI systems, voice assistants, and "smart" browsers interpret content correctly.
Sites built on <div> and <span> are read poorly by algorithms.
Conclusion:
<div> and <span> are only needed as auxiliary containers
when there is no suitable semantic tag.
Proper markup should reflect meaning:
<header> is a header, <nav> is a menu, <article> is content, <footer> is a footer.
This makes the page understandable both to machines and to people.
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