client-side tracking vs server-side tracking

For those running Shopify stores and actively advertising on Google Ads, Meta (FB/IG), and using Klaviyo — I’m curious about your experience with tracking setups.

If I move from client-side tracking to server-side tracking, will I likely see a noticeable shift in ad performance and attribution accuracy?

I’m especially wondering:

How much of an impact did it have on reported conversions, ROAS, and customer journey tracking?

Did you see a difference across Google Ads, Meta, and Klaviyo specifically?

If the improvement was real, which third-party server-side tracking solution worked best for you? (Thinking along the lines of Elevar, Littledata, Stape, etc.)

I’d love to hear real-world feedback from brand owners and performance marketers who’ve made the switch.

Thanks in advance! 🙌

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