Search Engine Marketing (SEM) increases visibility on search results pages. In practice, SEM often means paid search / PPC, while SEO covers organic visibility. Strong programs use both.
Learning Objectives
By the end of this chapter, you will be able to:
- Define SEM and PPC and explain how they relate to SEO.
- Explain how the ad auction uses bids and Quality Score to set Ad Rank.
- Calculate Ad Rank and approximate actual CPC in a simple auction.
- Decide when to use PPC, SEO, or both.
What Is PPC?
You pay when someone clicks (or, in some formats, for impressions/views). You buy visits with commercial intent instead of waiting only for organic rankings.
How the Auction Works
For each eligible query, Google estimates Ad Rank from:
- Your bid
- Quality Score inputs (expected CTR, ad relevance, landing page experience)
- Ad formats / extensions expected to improve performance
Highest Ad Rank wins better positions — not always the highest raw bid. Improving relevance can lower CPC.
Worked example: a simplified auction
The classic teaching formula is Ad Rank = maximum bid × Quality Score, and the winner pays just enough to beat the advertiser below:
Actual CPC ≈ (Ad Rank of the advertiser below ÷ your Quality Score) + Rs. 1
| Advertiser | Max bid (Rs.) | Quality Score | Ad Rank | Position | Actual CPC (Rs.) |
|---|---|---|---|---|---|
| Hotel A | 40 | 8 | 320 | 1 | 250 ÷ 8 + 1 ≈ 32.25 |
| Hotel B | 50 | 5 | 250 | 2 | 120 ÷ 5 + 1 = 25 |
| Hotel C | 60 | 2 | 120 | 3 | (minimum price) |
Hotel C bids the most but ranks last because its ads and landing page are poor. Hotel A ranks first and pays less than its maximum bid. Google’s real system uses more signals, but the lesson holds: relevance is cheaper than money.
Key PPC terms
- CPC (cost per click): what you pay for one click.
- Quality Score (1–10): Google’s rating of expected CTR, ad relevance, and landing page experience.
- Impression share: the percentage of eligible searches where your ad appeared.
- Conversion: a valuable action, such as a booking, call, or WhatsApp message.
PPC Building Blocks
Keywords → ads → landing page → conversion tracking → structure (campaigns/ad groups).
SEO vs PPC
| SEO | PPC | |
|---|---|---|
| Speed | Months | Hours/days |
| Payment | Content/tech time | Per click/result |
| Best for | Enduring demand | Tests, launches, competitive terms |
Case study: Boutique hotel in Pokhara
Problem: Organic rankings for “hotel near Fewa Lake” were weak in peak season; rooms still empty mid-week.
PPC approach:
- Search campaign for high-intent terms (“hotel pokhara lake view”, “fewa lake hotel booking”)
- Exact/phrase match for money terms; negatives for “jobs”, “internship”
- Landing page with photos, map, WhatsApp, and NPR rates
- Offline conversion note: reservations confirmed by phone still counted as leads
Outcome pattern: Occupancy gaps filled faster than SEO alone; after 90 days, SEO content targeted the same themes so paid could be reduced on cheaper organic terms.
Nepal practice: Always connect Ads → GA4 key events (form, call, WhatsApp). Without tracking, “cheap CPC” can still be expensive noise.
Learn more: PPC marketing in Nepal.
Summary
Search engine marketing increases visibility on results pages, and in practice usually means pay-per-click search advertising alongside SEO. In each auction, Google combines the bid with Quality Score (expected CTR, ad relevance, landing page experience) and expected asset impact to set Ad Rank. Because of this, a relevant advertiser can rank higher and pay less than a competitor who simply bids more. PPC delivers fast, targeted traffic; SEO builds lasting visibility; strong programs use both, connected to conversion tracking.
Key Takeaways
- SEM = paid + organic search visibility; PPC = paying per click.
- Ad Rank depends on bid and quality, not bid alone.
- Higher Quality Score usually means better positions at lower CPC.
- Without conversion tracking, cheap clicks can still waste money.
Discussion Questions
- When should a new business in Nepal start with PPC rather than SEO?
- How could a hotel improve its Quality Score without raising its bid?
- Why did the Pokhara hotel reduce paid spend after 90 days?
Exam-Style Questions
Short answer
- Define SEM and PPC.
- What is Quality Score, and what are its components?
- What is Ad Rank?
- State two differences between SEO and PPC.
Long answer
- Explain how the Google Ads auction works and why the highest bidder does not always win the top position. Use a numerical example.
- Compare SEO and PPC and explain how a business in Nepal can use them together.
