What is client-side testing?
Client-side testing is the experimentation process of rendering variations at the browser level.
Advantages of client-side testing
Here are the benefits of client-side testing:
Easy to adopt
There are client-side A/B testing tools like VWO that offer a WYSIWYG editor, which doesn’t require coding to create variations. Such testing frameworks make it easy to adopt client-side testing, especially if the company is small and can’t afford a development team.
Low investment cost
It requires less financial investment compared to server-side testing. Client-side testing is a preferred mode of experimentation for businesses that are on a budget crunch or new to optimization.
Ability to test often
Client-side testing allows for intuitive tools to create variations, which makes it easy for the CRO team to create variations frequently and test more hypotheses.
Limitations of client-side testing
Here are the limitations of client-side testing:
May reduce the website speed
Limited to UI/UX testing
Cannot run omnichannel experiments
Client-side tests cannot run on the web and app at the same time. For omnichannel experiments, server-side experimentation is suitable.
Lifecycle of the client-side testing
Client-side testing involves multiple stages, which are as follows:
a. Behavior analysis
Optimization starts with understanding the existing user flow and behavior. Typically, behavior analysis involves studying visitor data on analytics tools, analyzing dynamic heatmaps, understanding funnel journeys, and watching session recordings.
b. Creating hypothesis
Based on the behavior analysis, a hypothesis that highlights the element for experimentation and the expected effect on a KPI is formulated.
c. Client-side testing
Client-side A/B or multivariate test is conducted to track and compare the performance of the variation to the original page called control. The experimentation ends with a winner. One important thing to note here is that multi-armed bandit testing is gaining popularity because it exposes the traffic to better-performing variation with time before the test reaches statistical significance.
In the end, the winning variation is deployed on the live website exposing all the visitors to the new experience.
The whole process of client-side testing is documented with learnings, rectified mistakes, and results. It acts as a reference for future optimization campaigns.
The lifecycle of client-side testing involves behavior analysis, creating a hypothesis, client-side testing, and deployment of the winning variation. Complex and dynamic experimentation is feasible only via server-side testing.
You can start client-side testing with VWO for free. Know more about the VWO Testing starter pack on the plans and pricing page.