Google BERT: A better understanding of complex queries

November 4, 2019

By announcing it as the “biggest change of the last five years” and “one that will impact one in ten searches”, Google sure turned some heads with an inconspicuous name: BERT. BERT is a Natural Language Processing (NLP) model that helps Google understand language better in order to serve more relevant results. There are million-and-one articles online about this news, but we wanted to update you on this nonetheless. In this article, we’ll take a quick look at what BERT is and point you to several resources that’ll give you a broader understanding of what BERT does.

To start, the most important thing to keep in mind that Google’s advice never changes when rolling out these updates to its algorithm. Keep producing quality content that fits your users’ goals and make your site as good as possible. So, we’re not going to present a silver bullet for optimizing for the BERT algorithm because there is none. 

What is BERT?

BERT is a neural network-based technique for natural language processing (NLP) pre-training. The full acronym reads Bidirectional Encoder Representations from Transformers. That’s quite the mouthful. It’s a machine-learning algorithm that should lead to a better understanding of queries and content. 

The most important thing you need to remember is that BERT uses the context and relations of all the words in a sentence, rather than one-by-one in order. So BERT can figure out the full context of a word by looking at the words that come before and after it. The bi-directional part of it makes BERT unique.

By applying this, Google can better understand the full gist of a query. Google published several example queries in the launch blog post. I won’t repeat them all but want to highlight one to give you an idea of how it works in search. For humans, the query [2019 brazil traveler to usa need a visa] obviously is about answering if a traveler from Brazil needs to have a visa for the USA in 2019. Computers have a hard time with that. Previously, Google would omit the word ‘to’ from the query, turning the meaning around. BERT takes everything in the sentence into account and thus figures out the true meaning.

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As you can see from the example, BERT works best in more complex queries. It is not something that kicks in when you search from head terms, but rather the queries in the long tail. Still, Google says it will impact every one in ten searches. And even then, Google says that BERT will sometimes get it wrong. It’s not the end-all solution to language understanding.

Where does Google apply BERT?

For ranking content, BERT is currently rolled out in the USA for the English language. Google will use the learnings of BERT to improve search in other languages as well. Today, BERT is used for featured snippets in all markets where these rich results appear. According to Google, this leads to much better results in those markets.

Useful resources

We’re not going into detail into what BERT does, talking about its impact on NLP and how it’s now being incorporated into search, because we’re taking a different approach. If you want to understand how this works, you should read up on the research. Luckily, there are plenty of readable articles to be found on this subject. 

This should give you a solid understanding of what is going on in the rapidly developing world of language understanding.

Google’s latest update: BERT

The most important takeaways from this BERT news is that Google is yet again becoming closer to understanding language on a human level. For rankings, it will mean that it will present results that are a better fit to that query and that can only be a good thing. 

There’s no optimizing for BERT other than the work you are already doing: produce relevant content of excellent quality. Need help writing awesome content? We have an in-depth SEO copywriting training that shows you the ropes.

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