Search Volume & Keyword Difficulty

Search volume and keyword difficulty are useful estimates, but neither tells you whether a keyword deserves a page. Volume estimates demand. Difficulty estimates competition according to a tool's own model. A sound SEO decision also needs search intent, the actual results page, business value, location, and evidence that your website can provide a better answer.

That distinction matters in South Africa, where small absolute numbers can still represent valuable local or business-to-business demand. The aim is not to find the biggest number or the lowest score. It is to find a query that the right customer uses, then decide whether an existing page or a new page can satisfy it.

What Search Volume Actually Measures

Google Ads defines average monthly searches as the average number of searches for a keyword and its close variants, based on the selected date range, location, and Search Network settings. The default historical view averages a 12-month period. That means the value is an average under a particular set of filters, not a count of unique people and not a promise of organic visits.

Third-party SEO platforms build their own estimates from data partnerships and modelling. Their values may be more granular than the ranges shown in some Keyword Planner accounts, but they remain estimates. Use one primary source consistently when comparing a list, and record the market and date of collection.

Four checks before trusting a volume number

1. Location: confirm that the database or campaign is set to South Africa, a province, or a city that matches the market.
2. Period: check whether a 12-month average is hiding a recent rise, decline, or seasonal peak.
3. Match scope: understand whether close variants are combined with the exact phrase.
4. Search surface: volume is not the same as available organic clicks. Ads, maps, shopping results, featured answers, and AI features can change what searchers do.

Why volume can mislead

Google Trends is helpful for direction, not absolute volume. Google explains that Trends uses a sample of searches and normalises each data point by time and location before scaling results from 0 to 100. Compare relative interest; do not read a Trends score of 100 as 100 searches.

What Keyword Difficulty Actually Measures

Keyword difficulty usually appears as a score from 0 to 100, with a higher number indicating stronger competition. The calculation is proprietary and varies by provider.

For example, Semrush describes KD as an estimate of the SEO effort required to enter Google's top ten. Its model considers factors such as the referring domains and authority of ranking pages as well as characteristics of the results page. Semrush also offers a personal difficulty estimate that includes the relevance and strength of a specified domain.

Other tools use different inputs and weightings. This leads to three practical rules:

• Do not compare a score from one provider with the same number from another.
• Do not convert KD into a fixed backlink target or a promised timeframe.
• Re-check the live results; the score cannot fully describe intent, content quality, brand preference, local packs, or the resources needed to make a credible page.

When a low KD score is still a poor opportunity

A query can look easy while being wrong for the business. Common examples include:

• Google is ranking tools, videos, forums, or product pages, but you plan to publish a generic article.
• The query is ambiguous and most searches relate to a different product or country.
• The results are dominated by local packs while the business lacks a relevant, eligible location.
• The topic requires first-hand testing, professional credentials, or original data you cannot truthfully provide.
• The page would duplicate an existing article or service page and split their relevance.

When a higher KD score may still deserve investment

A difficult query can be worthwhile when it is central to the offer, competitors are earning qualified demand from it, and the business can build a distinct long-term asset. It may require a stronger service page, original examples, demonstrable expertise, internal links, digital PR, and patience. Difficulty is an input to sequencing, not an instruction to avoid every competitive market.

A Better Keyword Prioritisation Framework

Score the opportunity using evidence rather than universal volume or KD bands.

A practical sequence

1. Start with the customer problem. Collect language from enquiries, sales calls, support questions, site search, and Search Console.
2. Group related phrases by intent. Avoid making a separate page for every variation when one complete page can satisfy the cluster.
3. Inspect the South African results. Note page type, local features, freshness, credible sources, and whether the query has commercial or informational intent.
4. Compare demand and difficulty in one tool. Keep the location and collection date consistent.
5. Choose the right destination. Improve an existing page when it already matches the intent; create a page only when there is a genuine gap.
6. Define success before publishing. Early signals may be discovery, indexing, impressions, and query coverage. Later signals should include qualified visits and enquiries.
7. Review the decision with real performance data. Search Console impressions can validate demand that keyword tools missed, while conversions reveal whether the traffic matters.

Applying the Framework in South Africa

Do not apply United States or global benchmarks to a South African campaign without changing the location. A national business, a Pretoria service provider, and a company serving one suburb face different demand and results pages.

For a local service query, check whether Google shows a map pack, directories, service pages, or informational guides. Confirm that the business genuinely serves the area and that the site contains useful location-specific evidence. Creating interchangeable city pages merely because a tool lists each city is not a durable strategy.

For specialised B2B work, a small number of searches can represent meaningful pipeline. Use expected lead quality and sales relevance alongside volume. The responsible conclusion is often “limited measured demand, high business relevance,” not “too small to target.”

What CPC Can and Cannot Tell You

Cost per click can indicate that advertisers value a query, but it does not prove organic conversion value. CPC changes by auction, location, device, match type, and time. Treat it as supporting evidence, then validate with the site's own enquiry and revenue data.

The same caution applies to labelled search intent. Tool classifications are convenient starting points. Read the current results and the page content Google rewards before assigning a page format.

Decision Example

Imagine two South African queries:

• Query A has higher estimated volume, mixed intent, several answer features, and no clear connection to a Symaxx service.
• Query B has lower estimated volume, clear comparison intent, relevant service pages in the results, and language that appears in real sales conversations.

Query B may be the better priority even if its KD is higher. It connects demand to an offer and gives the business a credible route to a useful page. The decision follows evidence and customer value, not a universal “high volume, low difficulty” formula.

Key Takeaways

• Search volume is a filtered historical estimate, not a traffic forecast.
• Keyword difficulty is a provider-specific model, not a Google ranking score.
• Keep the tool, market, and date consistent when comparing opportunities.
• Validate every promising keyword against the live results page and the intended audience.
• Prioritise intent, business value, distinctive usefulness, and existing page equity alongside metrics.
• Build one strong page for a coherent intent cluster instead of producing near-duplicate pages for every wording variation.

Sources

• Google Ads Help: About Keyword Planner forecasts
• Google Trends Help: Frequently asked questions about Trends data
• Semrush: What is Keyword Difficulty?
• Google Search Central: Creating helpful, reliable, people-first content

Related SEO Documentation

• What Is Keyword Research?
• Types of Keywords
• How to Find Keywords for Your Business
• Long-Tail Keywords
• Competitor Keyword Analysis
• Free vs Paid Keyword Research Tools