Better Snippets for your Users
Before buying a book, people like to get a snapshot of how they’re about to spend a few hours reading. They'll take a look at the synopsis, the preface, or even the prologue just to get a sense about whether they'll like the book.
Search result snippets are much the same; they help people decide whether or not it makes sense to invest the time reading the page the snippet belongs to.
The more descriptive and relevant a search result snippet is, the more likely that people will click through and be satisfied with the page they land on. Historically, snippets came from 3 places:
- The content of the page
- The meta description
- DMOZ listings
The content of the page is an obvious choice for result snippets, and the content that can be extracted is often the most relevant to people’s queries. However, there are times when the content itself isn't the best source for a snippet. For instance, when someone searches for a publishing company for their book, the relevant homepages in the result set may contain only a few images describing the businesses and a logo, and maybe some links, none of which are particularly useful for a snippet.
The logical fallback in cases when the content of a page doesn't have much textual content for a search result snippet is the meta description. This should be short blurbs that describe accurately and precisely the content in a few words.
Finally, when a page doesn't have much textual content for snippet generation and the meta description is missing, unrelated to the page, or low quality, our fallback was DMOZ, also known as The Open Directory Project. For over 10 years, we relied on DMOZ for snippets because the quality of the DMOZ snippets were often much higher quality than those provided by webmasters in their meta description, or were more descriptive than what the page provided.
With DMOZ now closed, we've stopped using its listings for snippeting, so it's a lot more important that webmasters provide good meta descriptions, if adding more content to the page is not an option.
What makes a good meta description?
Good meta descriptions are short blurbs that describe accurately the content of the page. They are like a pitch that convince the user that the page is exactly what they're looking for. For more tips, we have a handy help center article on the topic. Remember to make sure that both your desktop and your mobile pages include both a title and a meta description.
What are the most common problems with meta descriptions?
Because meta descriptions are usually visible only to search engines and other software, webmasters sometimes forget about them, leaving them completely empty. It's also common, for the same reason, that the same meta description is used across multiple (and sometimes many) pages. On the flip side, it's also relatively common that the description is completely off-topic, low quality, or outright spammy. These issues tarnish our users' search experience, so we prefer to ignore such meta descriptions.
Is there a character limit for meta descriptions?
There's no limit on how long a meta description can be, but the search result snippets are truncated as needed, typically to fit the device width.
What will happen with the "NOODP" robots directive?
With DMOZ (ODP) closed, we stopped relying on its data and thus the NOODP directive is already no-op.
Can I prevent Google from using the page contents as snippet?
You can prevent Google from generating snippets altogether by specifying the "nosnippet" robots directive. There's no way to prevent using page contents as snippet while allowing other sources.
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