If your business uses Gmail, Microsoft 365, Xero, Shopify, or almost any modern software-as-a-service tool, you’re already using cloud computing. Most small businesses are — often without thinking of it in those terms.
But there’s a difference between using cloud services and understanding them well enough to use them effectively and safely. This article is a plain-English explanation of what cloud computing actually is, how it applies to small businesses, and what you should be thinking about as you rely on it more.
What Cloud Computing Actually Means
“The cloud” is, at its most basic, someone else’s computer. Instead of running software on a server in your office or files on your local hard drive, you’re running software on servers owned and operated by a provider — accessed over the internet.
The key practical difference: you don’t need to own, manage, or maintain the physical infrastructure. The provider does. You pay for access to the capability, typically on a subscription basis.
There are three main models you’ll encounter:
Software as a Service (SaaS). This is the most common for small businesses. Gmail, Microsoft 365, Xero, Salesforce, Shopify, Slack — these are all SaaS products. You access them through a browser or app. You don’t manage any servers or infrastructure. The provider handles everything technical; you just use the software.
Infrastructure as a Service (IaaS). You rent virtualised computing infrastructure — servers, storage, networking — from a provider like Amazon Web Services (AWS), Microsoft Azure, or Google Cloud. You have more control and more responsibility. This is typically used by businesses with development teams or specific technical requirements.
Platform as a Service (PaaS). A middle ground — you get a managed platform on which to deploy and run applications, without managing the underlying servers. Less common at SMB level.
Why Businesses Move to the Cloud
The shift to cloud services has been driven by genuine practical advantages:
No upfront hardware costs. A server in your office requires capital expenditure, physical space, maintenance, and eventually replacement. Cloud services convert that to operational expenditure — monthly fees — with no hardware to manage.
Accessibility. Cloud services are accessible from anywhere with an internet connection. This is what made remote working viable at scale.
Scalability. You can increase or decrease your usage — and your costs — relatively quickly. Growing businesses aren’t constrained by the capacity of hardware they’ve already bought.
Automatic updates. SaaS providers manage software updates, security patches, and infrastructure maintenance. You get the current version without managing it yourself.
Reliability. Major cloud providers invest in redundancy and uptime at a level that very few small businesses could replicate with on-premises infrastructure.
What You Should Be Thinking About
Moving to cloud services doesn’t eliminate IT considerations — it changes them. The key things to think through:
What data is where. As businesses adopt more cloud tools, data can become spread across multiple services without clear awareness of where it all sits. Customer data in your CRM, financial data in your accounting platform, communications in email and messaging tools — knowing what data lives in which service matters for security, compliance, and business continuity.
Access management. Cloud services are accessible from anywhere, which means access management is critical. Who has access to what? Are former employees’ accounts deactivated? Is MFA enabled on everything? Are access permissions appropriate for each person’s role?
Data ownership and portability. If you switch providers, can you get your data out? In what format? What are the contractual terms around data ownership? These questions matter more if you switch or if a provider changes their terms.
Security responsibility. Cloud services operate on a shared responsibility model. The provider secures the infrastructure. You are responsible for how you use it — access management, data handling, configuration. Many breaches of cloud services occur not because the provider was compromised, but because the customer misconfigured something.
Integration and dependencies. Modern businesses run on many connected cloud services. Understanding those integrations — what connects to what, and what breaks if one service goes down — is important for business continuity planning.
In our next article, we’ll look at how to evaluate cloud providers and what questions to ask before committing to a new cloud service. And in subsequent articles, we’ll cover cloud backup, hosting, and how to keep your cloud environment secure.
W3IT helps small businesses assess and manage their cloud environment — including what services they’re running, how they’re configured, and where the security and operational risks lie. If your cloud setup has grown organically over the years and you’re not sure exactly what you have, that’s a good place to start.