Ahrefs keyword difficulty and search volume explained

Practical example:

• KD 10 → Small blogs or niche sites can compete.
• KD 50 → Requires strong content and backlinks, typically a medium-sized website or authority in the niche.
• KD 80+ → Usually dominated by large, established websites. You’d need a big SEO effort.

Tip: KD is not absolute. If your site has high authority, you might rank for higher KD keywords more easily.

2. Search Volume

What it is:
Search volume is the average number of times a keyword is searched per month on Google (Ahrefs pulls data from clickstream and Google Keyword Planner estimates).

Key points:

• Shown as monthly searches (e.g., 1,000/mo).
• Usually a global or country-specific metric.
• Can indicate potential traffic if you rank well.

Interpreting it:

• High search volume = more potential traffic, but usually more competition.
• Low search volume = less competition, but also smaller audience.

Important nuance:

• Some keywords have high search volume but low click-through, e.g., “Facebook” – people might use it for navigation, not content.
• Volume alone doesn’t guarantee traffic; intent and CTR matter.

3. How to Use KD and Volume Together

Think of KD and search volume as a difficulty-reward map:

Rule of thumb:

• Small/new sites: focus on KD < 20–30 keywords.
• Medium authority: KD 30–50 is realistic.
• High authority: can tackle KD 50–70+ if content is stellar.

If you want, I can also show a step-by-step example of picking a keyword using Ahrefs KD and volume—so you see exactly how to decide what’s worth targeting. It’s like building a mini SEO blueprint.

Do you want me to do that?

KD scale (0–100)

• 0–10: Very easy (low competition)

• 10–30: Easy–moderate

• 30–70: Competitive

• 70–100: Very hard

The scale is not linear —higher numbers require exponentially more backlinks to compete.Source 1

Example

• KD 10 → maybe ~10 backlinks needed

• KD 50 → ~80+ backlinks needed

• KD 90 → hundreds of backlinks neededSource 1

🔍 2. Search Volume — “How many people search it?”

Definition:
Search Volume is the average number of monthly searches for a keyword in a specific location.Source 1

Key details

• Based on a 12-month average

• Represents searches, not unique peopleSource 1

👉 Example:

• “best laptops” → 50,000 searches/month

• That doesn’t mean 50,000 people—some users search multiple times

⚖️ 3. How KD and Search Volume work together

These metrics answer two different questions:

The sweet spot

You want keywords that are:

• Low KD (easy to rank)

• Decent/high volume (traffic potential)

👉 Example strategy:

• KD 10 + 1,000 searches/month → great opportunity

• KD 80 + 100,000 searches/month → high traffic, but likely unrealistic (unless you’re a big site)

Ahrefs itself recommends combining both metrics to find keywords that bring traffic without huge effort.Source 1

⚠️ Important limitations (most beginners miss this)

1. KD is mostly about backlinks

• It does NOT consider content quality, intent, or brand strengthSource 1

2. Search volume ≠ actual clicks

• Some searches don’t generate clicks (e.g., featured snippets, Google answers)

3. Both are estimates

• No tool has perfect data (Google doesn’t reveal everything)

🧠 Simple analogy

Think of it like fishing:

• Search Volume = size of the lake (how many fish)

• Keyword Difficulty = how crowded the lake is (competition)

You don’t want:

• A huge lake full of expert fishermen (high KD)
  You want:

• A decent lake with fewer competitors (low KD + good volume)

✅ Bottom line

• Keyword Difficulty = effort required (mainly backlinks)

• Search Volume = potential traffic

• Best keywords = low difficulty + meaningful volume

If you want, I can show you how to pick “low KD, high ROI” keywords step-by-step or analyze a real keyword for you.

How to Use These Together

• Low Difficulty + High Volume: Ideal target; "low-hanging fruit."
• High Difficulty + High Volume: High competition; requires significant link-building efforts (often "link bait" topics).
• Low Difficulty + Low Volume: Good for building topical authority and getting faster, targeted traffic. Ahrefs +1

Important Note: Do not rely only on these numbers. Always use the SERP Overview in Ahrefs to look at the actual websites ranking top 10 (e.g., check their Domain Rating (DR) and content quality). Reddit

How to Use Them Together

• Low Volume/Low Difficulty: Potential low-hanging fruit.
• High Volume/High Difficulty: Competitive, requires a strong backlink profile.
• Strategy: Prioritize keywords that align with user intent, balancing high potential with realistic difficulty. Ahrefs

Note: Keyword difficulty is not a perfect science as Google does not disclose all ranking factors, so manual SERP analysis is always recommended. Ahrefs

For a visual breakdown of how these metrics compare to other popular tools, check out this Ahrefs keyword difficulty overview.

🧠 Important limitation

KD is not a full ranking prediction. It does NOT account for:

• Content quality

• Search intent

• Brand authority

• User behavior or SERP features

So a “low KD” keyword can still be hard if big sites dominate the results.

📈 2. What is Search Volume in Ahrefs?

Search volume = how many times people search a keyword per month.

📊 Example

If a keyword has:

• Search Volume = 5,000

It means:
👉 On average, ~5,000 searches per month (in that country/region)

Ahrefs calculates this using:

• Google Keyword Planner data

• A 12-month rolling averageSource 1

⚖️ 3. KD vs Search Volume (The key difference)

🧩 4. How they work together (this is the real SEO strategy)

Best SEO decision-making formula:

You want keywords with:

• ✅ High search volume (traffic potential)

• ✅ Low or medium KD (ranking is realistic)

Example:

• “best running shoes”

• High volume ✔

• Very high KD ❌ (hard to rank)

• “best running shoes for flat feet beginners”

• Lower volume ✔

• Lower KD ✔ (easier to rank)

⚠️ 5. Common misunderstanding

People often think:

“Low KD = easy ranking”

But in reality:

• KD only measures backlink difficulty

• Google ranking also depends heavily on content relevance and intent

So KD is best used as:
👉 A filtering tool , not a guarantee

🧠 Simple way to remember it

• Search Volume = demand (how many people want it)

• Keyword Difficulty = competition (how hard it is to win it)

If you want, I can also show you:

• how to find “low KD high traffic” keywords step-by-step in Ahrefs

• or how to judge whether KD is misleading for a specific keyword (very useful in practice)

Using KD and Volume Together

• Low Difficulty + High Volume: Ideal target keywords.
• High Difficulty + High Volume: Targets requiring substantial link-building campaigns.
• Low Difficulty + Low Volume: Excellent for new sites to gain initial traction. Keyword.com

Note: Keyword Difficulty is not an exact science and should be used as a relative guide. YouTube

• 0–10: very easy (little to no backlinks needed)

• 11–30: easy

• 31–50: moderate

• 51–70: hard

• 71–100: very hard

👉 Important: KD is mostly about backlink competition , not content quality or SEO skill level.

🟢 What is Search Volume in Ahrefs?

Search Volume is the average number of times people search for a keyword per month.Source 1

Example:

• “keyword research” → 10,000 searches/month

• “best long tail keyword tools” → 300 searches/month

Ahrefs calculates it as a 12-month average to smooth out seasonal changes.Source 1

🔥 Key difference (simple explanation)

🎯 How they work together

You usually use both together:

High volume + high KD

• Lots of traffic potential

• Very competitive (hard to rank)

Low volume + low KD

• Easier to rank

• Less traffic per keyword

Low KD + decent volume (gold mine)

• Best opportunity for SEO

• Easier rankings + meaningful traffic

🧠 Simple real-world analogy

• Search Volume = how many people are in the stadium

• Keyword Difficulty = how strong the teams already playing are

You want:

• Enough audience (volume)

• Weak enough competition to win (KD)

If you want, I can also show you how to pick “low KD + high intent” keywords step-by-step using Ahrefs , which is where most SEO wins actually come from.

👉 In simple terms:

The more strong backlinks top-ranking pages have, the higher the KD score.

Source 1Source 2

Important limitation

KD is not a complete ranking difficulty score because it does NOT include:

• Content quality

• Search intent match

• Domain authority nuances

• User behavior signals

So KD is best seen as a quick backlink competition indicator , not a full SEO prediction.

📊 2. What is Search Volume in Ahrefs?

Search Volume = average number of monthly searches for a keyword.

Example:

• “best running shoes” → 60,000 searches/month

• “how to tie running shoes” → 1,200 searches/month

Ahrefs typically uses a 12-month average to smooth seasonal fluctuations.Source 1

⚖️ 3. How KD and Search Volume work together

These two metrics answer different questions:

🔥 Key relationship

• High volume keywords → usually higher KD (more competition)

• Low volume keywords → often lower KD (easier to rank)

But not always:

• Niche keywords can have low volume + high KD

• Emerging topics can have high volume + low KD (temporarily)

🧭 4. How SEO professionals actually use them

Good keyword strategy usually looks like:

• Low KD + decent volume → easiest SEO wins

• Medium KD + high volume → longer-term targets

• High KD + high volume → competitive authority-building keywords

Example:

• KD 5, 500 searches → quick traffic wins

• KD 45, 20,000 searches → requires authority + backlinks

• KD 80, 100,000 searches → major brands dominate

⚠️ 5. Common misunderstanding

Many beginners think:

“Low KD = easy ranking guaranteed”

But in reality:

• A KD 5 keyword can still be hard if big sites dominate SERPs

• KD only reflects link competition , not full Google ranking complexitySource 1

🧠 Simple mental model

Think of it like this:

• Search Volume = how big the crowd is

• Keyword Difficulty = how strong the competitors are in that crowd

If you want, I can also show you:

• how to find low-KD high-traffic keywords step-by-step in Ahrefs

• or how to interpret KD for a real keyword you’re targeting

Combining Difficulty and Volume for Strategy

1. Low Difficulty + High Volume: These are the "golden" keywords, often low-hanging fruit, especially for new sites.
2. High Difficulty + High Volume: Target these only when your domain has high authority (DR).
3. Low Difficulty + Low Volume: Good for building topical authority in a niche. 321 Web Marketing

Note: Keyword difficulty is recalculated frequently based on SERP updates, with higher volume keywords being refreshed more often. Ahrefs