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# SEO Meta Tags - canonical, robots

When you want to prevent search engine penalties for duplicated content across multiple web pages or hide certain pages from search engines, there are techniques you can use.

Let's explore the meta tags `canonical` and `robots` that are utilized in these situations.

<br />

## canonical link

A `canonical` link informs the search engine which page is considered the "official" version when there is duplicate content across multiple pages.

```html title="Example of using a canonical link"
<head>
  <link rel="canonical" href="https://example.com/original-article" />
</head>
```

This canonical tag tells the search engine that the page "https://example.com/original-article" is the definitive version among the duplicated content.

<br />

## robots meta tag

The `robots` tag is used to instruct search engines on whether they are allowed to index a specific page or not.

If you don't want certain documents or information to be shared with others, you can use the robots meta tag as shown below.

```html title="Example of a robots meta tag"
<head>
  <meta name="robots" content="noindex, nofollow" />
</head>
```

The robots tag is an important meta tag that instructs search engines not to index a specific page. This allows you to prevent a particular page from appearing in search engine results.

### What is the most appropriate option to fill in the blank?