Statsig's Visual Editor, also called Sidecar, is a low-code tool for building and running A/B tests on your website without engineering work. You use a point-and-click interface to change styling, text content, calls to action, and injected scripts. Statsig assigns visitors to variants and measures the results with its stats engine.

## How A/B testing works

A/B testing, or split testing, is a fundamental method in digital marketing for validating website changes. It involves comparing two versions of a webpage to see which performs better with a target audience.

Traditionally, implementing A/B tests required substantial technical skills and collaboration between marketers and developers. This requirement led to longer implementation times and reduced agility for marketing teams.

## Statsig's visual editor

Statsig's Visual Editor lets marketers run A/B tests with minimal technical dependency. It provides an intuitive, point-and-click interface for setting up and managing A/B tests on your website. You can experiment on styling, text content, calls to action, and injected scripts that change page behavior.

Combined with Statsig's [industry-leading stats engine](/experiments/overview), Sidecar is a useful tool in a marketer's toolkit.

{% figure %}
![Statsig sidecar](/images/guides/sidecar-experiments/introduction/85a65ae3-6651-4d5b-87c0-4dadee6c8c30.png)
{% /figure %}

{% callout type="info" %}
This guide assumes you have an existing Statsig account. Go here to create a new free account if you don't already have one: https://statsig.com/signup
{% /callout %}

## Performance considerations

Sidecar, like any client-side tooling, introduces some degree of page load latency. Test Sidecar and verify that the performance impact falls within your acceptable threshold.

Performance-sensitive customers typically use the [JS-SDK](/client/javascript-sdk) for web testing. When using the JS/React SDKs with [Client Bootstrapping](/client/concepts/initialize), the latency is minimal because initialization requires no network requests.