Alex Birkett

Alex Birkett

Alex Birkett is former Growth Marketer at CXL. Follow him on Twitter

Client-Side Vs. Server-SideA/B Testing Tools: What's The Difference?

Marketers of all stripes are obsessed with tools.

This obsession has bred comprehensive lists of growth tools, SEO tools, and general online marketing tools. It is no different with us in conversion optimization. We nerd out on testing tools.

Though no optimization program has ever hinged on which tool you used, there are important distinctions between A/B testing tools—from the statistics they use, their price, and more.

One thing that is often either overlooked or misunderstood is the difference between client-side and server-side testing tools.

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When to Run Bandit Tests Instead of A/B/n Tests

When should you use bandit tests, and when is A/B/n testing best?

Though there are some strong proponents (and opponents) of bandit testing, there are certain use cases where bandit testing may be optimal. Question is, when?

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How to Build Robust User Personas in Under a Month

Customer personas are often talked about in marketing and product design, but they’re almost never done well.

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Form Validation: Why It Matters and How to Get It Right

Nothing is more frustrating than filling out a badly designed form.

It’s a common experience, though. How many times have you entered a password only to be taken back with red ink proclaiming “Error! Password needs a capital letter, two numbers, a special character, and a quote from a Fetty Wap song.”

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The Complete Guide to Writing Product Descriptions That Convert

Most product descriptions are awful. Or worse, non-existent.

Product copy and product descriptions seem like such minor parts of a website in the grand scheme of conversion optimization, so many brands brush it off. But for companies doing it right, writing excellent product descriptions is a great way to sprinkle brand personality in a place that most people don’t expect it.

In fact, some companies do product copy so well that it’s almost a feature of the product itself.

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How to Deal with Outliers in Your Data

One thing many people forget when dealing with data: outliers.

Even in a controlled online A/B test, your data set may be skewed by extremities. How do you deal with them? Do you trim them out, or is there another way?

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hero-image

The design of your website is more important for conversions than you think.

First impressions matter, and a good way to make one is with a hero image that complements your value proposition. But what’s a hero image, really, and how do you make them work for you?

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Survey Response Scales: How to Choose the Right One

How you design a survey or a form will affect the answers you get. This includes the language you use, the order of the questions, and, of course, the survey scale: the default values and ranges you use.

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18 Scarcity Examples that Can Boost Sales

It’s a cultural trope to “want what you can’t have,” but it’s also a principle based in decades of psychological research. That principle, scarcity, is incredibly powerful in marketing, persuasion, and conversion optimization—when done right.

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8 Ways To Measure Satisfaction (and Improve UX)

A good user experience equals more money. But how do we measure user experience? How do we know if it’s getting better or worse?

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