Yoast SEO is installed on millions of WordPress sites, yet most users only ever touch a fraction of its keyword functionality. They type one phrase into the focus keyphrase box, chase the green traffic light, and publish. Meanwhile the plugin quietly offers synonym support, multiple related keyphrases, internal linking suggestions and a full readability engine that together have a far bigger impact on rankings than a single green dot ever will. If you have ever wondered why the keyword fields on your screen look different from a tutorial you watched, the answer is usually that certain features need to be enabled, or that they belong to the premium tier.

This guide explains how to enable and use keywords in Yoast SEO properly. We will cover where the settings live, how to turn on the analysis features that are switched off by default, the difference between free and premium keyword options, and how to write content that satisfies both the plugin and an actual human reader searching on Google.

How We Can Help You Optimise WordPress Content

Plugins like Yoast are excellent assistants but poor strategists. They can tell you whether a phrase appears in your first paragraph; they cannot tell you whether that phrase is worth targeting, how competitive it is, or which page on your site should own it. That is where we come in. At AAMAX.CO we build keyword maps that assign one primary intent to every page, then optimise WordPress content around that map so your own pages stop competing with each other. If you want expert help turning a plugin score into actual traffic, hire AAMAX.CO for professional SEO services. We are a full service digital marketing company delivering web development, digital marketing and search optimisation for clients worldwide, and WordPress is one of our core platforms.

Where the Keyword Fields Actually Live

Open any post or page in the WordPress editor and scroll below the content area. In the block editor you will also find a Yoast icon in the top right sidebar. Either route opens the Yoast SEO panel, which contains an SEO tab, a Readability tab and a Schema tab. The SEO tab holds the focus keyphrase field. Type your target phrase there and Yoast immediately analyses the content, checking whether the phrase appears in the title, the slug, the meta description, the introduction, subheadings and image alt attributes.

If you cannot see this panel at all, the analysis features may be disabled. Go to Yoast SEO in the WordPress admin menu, open Settings, and look for the site features section. Ensure the SEO analysis and readability analysis toggles are switched on. Save your changes and the fields will reappear in the editor. On multi-author sites, also check that your user role has the permission to edit SEO settings, because some setups restrict this to editors and administrators.

Enabling Multiple Keyphrases and Synonyms

The free version of Yoast supports one focus keyphrase per page. The premium version adds related keyphrases and synonyms. Synonyms tell Yoast that variations of your phrase should count toward your optimisation, which prevents the plugin from pushing you to repeat an awkward exact-match phrase unnaturally. Related keyphrases let you track secondary terms with their own analysis scores, which is genuinely useful for long-form articles that legitimately cover several closely connected subtopics.

To enable them, install and activate Yoast SEO Premium, then reload your post editor. Beneath the focus keyphrase field you will see an option to add a synonym and an option to add a related keyphrase. Add your variants, and Yoast recalculates its analysis to include them. If you are on the free version, do not panic. You can still target secondary terms effectively by writing natural subheadings around them; Google understands topical relationships without the plugin needing to score them.

Choosing the Right Keyphrase in the First Place

Enabling the field is trivial. Choosing what to put in it is the real work. A good focus keyphrase has three properties: real search demand, matching intent, and a realistic chance of ranking given your site's authority. Use a keyword tool to check monthly volume, then look at the current results page. If the top ten are all national publications and your site is a local service business, pick a longer, more specific phrase instead.

Match intent carefully. If every result for a phrase is a comparison list and you have written a product page, you will not rank no matter how green your score is. Assign one primary keyphrase to one page only. When two pages target the same phrase, you split your own signals and confuse search engines about which to rank, a problem known as keyword cannibalisation that quietly limits a huge number of WordPress sites.

Using the Analysis Without Keyword Stuffing

Yoast's checks are guidelines, not commandments. Aim to include your keyphrase naturally in the SEO title, the URL slug, the meta description, the opening one hundred words, at least one subheading and one image alt attribute. Beyond that, write for the reader. If the plugin complains that keyphrase density is too low but your article reads well and covers the topic thoroughly, leave it alone. Modern search engines evaluate meaning and coverage, not repetition counts.

Pay equal attention to the readability tab. Shorter sentences, active voice, transition words and frequent subheadings genuinely improve time on page and reduce bounces, and those behavioural signals matter. A page with an orange SEO bullet and excellent readability will usually outperform a keyword-stuffed page with a green one.

Other Yoast Features Worth Switching On

While you are in the settings, enable a few adjacent features that amplify your keyword work. Turn on XML sitemaps so new content is discovered quickly. Configure your default social preview so shared links look intentional. Set up breadcrumbs if your theme supports them, because they strengthen internal linking and can appear in search results. Use the search appearance settings to control which content types get indexed, and deliberately exclude thin archives such as tag pages that add no value.

Internal linking is the most underused Yoast feature of all. Premium suggests relevant internal links as you write, and every one of those links passes context and authority between related pages. Even manually, adding three to five contextual internal links per article compounds into a significantly stronger site over time. This kind of structural work sits at the heart of the digital marketing programmes we run, and it pairs naturally with our GEO services for brands that also want visibility inside AI answer engines.

Final Thoughts

Enabling keywords in Yoast SEO comes down to confirming the SEO analysis toggle is active in the plugin settings, using the focus keyphrase field in every post, and upgrading to premium if you need synonyms and multiple related keyphrases. The far more important discipline is choosing one clear phrase per page, writing genuinely useful content around it, and linking your pages together sensibly. Get that right and the green lights will follow, along with the rankings. If you want that strategy built for you, our team can take it from here.