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GA4 Shows Traffic Growth After Hiring an Agency - But Source Is Unclear. Can GA4 Traffic Be Manipulated?

 Let me explain this in a very simple way.

A website was working normally for months.
Traffic was stable. Leads were stable.

Then an external agency was hired to “improve performance”.

After that:

  • GA4 started showing big traffic growth
  • Reports looked positive
  • But business results didn’t change

I’m not blaming the agency.
I’m trying to understand what GA4 can and cannot tell us.

What GA4 Is Showing -

Traffic Growth Example
Before agency:

  • ~1,000 users per day

After agency:

  • ~2,500–3,000 users per day

No major:

  • SEO content launch
  • Ads
  • PR activity

Traffic increased, but the reason is unclear.

GA4 Source Confusion

GA4 reports show:

  • Majority traffic as Organic Search
  • Some traffic as Direct
  • Very little referral or social traffic

But:

  • GA4 doesn’t clearly show where these users actually came from
  • No specific pages, keywords, or referrers explain the spike

Example:
It feels like people are entering a building, but the entry gate is missing from CCTV footage.

Engagement Looks “Okay”

GA4 says:

  • Engagement rate ~50%
  • Average time ~25–35 seconds

But in reality:

  • No form submissions increase
  • No calls increase
  • No meaningful clicks increase

Example:
People enter a store, stand for 30 seconds, and leave without touching anything — again and again.

Conversion Reality

Before agency:

  • 10 enquiries per week

After agency:

  • Still 10 enquiries per week
  • Traffic up. Results flat.
  • This is where doubt starts

Where My Confusion Starts

GA4 is showing:

  • More users
  • Acceptable engagement
  • “Healthy-looking” reports

But:

  • Source is unclear
  • Intent is missing
  • Outcomes don’t change

So I’m asking this from a technical perspective, not an emotional one.

Simple Questions to the Community

Is it technically possible to manipulate GA4 traffic?
For example:

  • Send automated visits
  • Trigger GA4 events
  • Make traffic look organic or direct

Can bots make GA4 think users are “engaged”?
Like:

  • Staying 20–30 seconds
  • Scrolling slightly
  • Firing basic events

Why does GA4 sometimes fail to show the real source?
Is this because:

  • Referrer is hidden?
  • Traffic is injected?
  • User agents are masked?

Have you seen agency reports where GA4 looked great but nothing actually improved?

What I’m Really Trying to Learn

Not:

“Who is wrong?”

But:

  • How much should we trust GA4 alone?
  • What should we cross-check to validate traffic quality?
  • If you were auditing this, what’s the first red flag you’d check?

for context i'm talking for - https://www.kay2steel.com/

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