"For every action, there is an equal and opposite reaction."

I haven't sat in a physics classroom for... let's just say a while.

Fun fact though: at high school, my favourite subjects were Advanced Maths and Physics.

If you'd asked 17-year-old me what I'd be doing today, becoming an Art Director—and later helping ecommerce brands grow through Shopify, Klaviyo and customer experience strategy—wouldn't have been on the list.

Funny how life works.

Yet all these years later, one lesson from physics pops into my head surprisingly often when I'm working with ecommerce brands.

Not because websites obey the laws of motion.

But because every change you make to your business creates a ripple effect somewhere else.

Nothing Exists in Isolation

One of the most common things I hear from clients is:

"We just updated this."

or

"We deleted that."

Sometimes they're small changes.

A product is removed.

Shipping prices are updated.

A collection gets renamed.

A new app is installed.

Individually, none of these sound like a big deal.

Until you start asking...

• Does this affect a Klaviyo flow trigger?
• Is an upsell app relying on that product?
• Why have my Meta ads suddenly started sending people to a 404 page?
• Have the shipping details changed on the website, FAQs and Shipping Policy?
• Are there blog posts or SEO pages mentioning the old information?
• Does another app depend on that collection existing?

Suddenly, what looked like a five-minute update isn't five minutes at all.

Because everything is connected.

Ecommerce Is an Ecosystem

Your Shopify store isn't just a website.

It's connected to your email marketing.

Your apps.

Your automations.

Your analytics.

Your advertising.

Your customer experience.

Every part of your business influences another.

When one piece changes, another often needs to change too.

Sometimes several others.

That's why I encourage clients to stop thinking about individual tasks and start thinking about systems.

The Power of Seeing the Bigger Picture

This is probably why I'm slightly obsessed with Google Sheets.

Every Klaviyo client receives a fully mapped flow plan.

Not because it looks pretty (although I do love a colour-coded spreadsheet).

But because everyone involved can immediately see:

• what triggers each flow
• where customers move next
• how emails interact
• where overlaps might occur
• what happens if something changes

The same applies to Shopify.

If your team is uploading products, have a documented process.

When a product goes live, what else needs updating?

Who owns each step?

What gets checked before it's published?

The more visible your systems are, the easier they are to maintain—and the less likely important tasks are to slip through the cracks.

Systems Prevent Expensive Mistakes

The ecommerce businesses that scale well aren't necessarily the ones with the fanciest websites.

They're the ones with good systems.

Clear documentation.

Ownership.

Processes.

Because when something inevitably goes wrong—and at some point, it will—you're not trying to solve a mystery.

You already know where to look.

Every Action Creates a Reaction

Every action creates a reaction.

In ecommerce, that reaction isn't always immediate or obvious.

Sometimes it's a broken automation.

Sometimes it's a 404 page.

Sometimes it's a customer who quietly gives up because something no longer works the way they expected.

The more your business grows, the more interconnected everything becomes.

So before making your next "small" update, pause for a moment and ask yourself:

"What else could this affect?"

That one question can save hours of troubleshooting, prevent costly mistakes, and create a smoother experience for both your team and your customers.

Because the best ecommerce stores aren't built by accident.

They're built with systems.