For example:

 <p>This is a paragraph.</p>

Here, <p></p> marks the start of a paragraph, and

Some tags don't need a closing tag—they're called self-closing tags. For instance, images use <img alt="什麼是HTML標(biāo)籤，它們?nèi)绾味x元素？" > , and line breaks use <br> .

How Tags Define Elements

Each tag tells the browser what kind of element it's dealing with. That affects how the content looks and behaves. Here's how that works:

<li> Structure : Tags create a document outline. <h1></h1> through <h6></h6> define headings, <p></p> defines paragraphs, and <ul></ul> or <ol></ol> handle lists. <li> Semantics : Some tags carry meaning beyond formatting. For example, <article></article> tells both browsers and search engines that this section contains standalone content. <li> Functionality : Tags like <a></a> (for links) and <button></button> add interactive features right out of the box.

So when you use the right tag for the job, you're not just styling content—you're helping browsers, screen readers, and search engines understand it better.

Common Tags and What They Do

Here are a few basic but important HTML tags and their roles:

<li> <h1></h1> to <h6></h6> – Headings from most to least important <li> <p></p> – Paragraphs <li> <a></a> – Links (usually with an href attribute) <li> <img alt="什麼是HTML標(biāo)籤，它們?nèi)绾味x元素？" > – Images (requires a src attribute) <li> <div> – A generic container for styling or layout<li> <code><span></span> – Inline container, often used for small bits of text <li> <ul></ul> , <ol></ol> , <li> – Lists and list items

Using these correctly helps keep your HTML clean and easy to work with, especially when combining it with CSS or JavaScript later on.

基本上就這些. You don't need to memorize every tag off the top of your head—jus??t know what purpose they serve and pick the one that fits best.