After completing the experiment configuration, publish and launch it in production. Sidecar makes this process straightforward with a few steps.
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This guide assumes you have followed the previous steps of creating an experiment in Sidecar. Check out [Creating Experiments](/guides/sidecar-experiments/creating-experiments) for those instructions.
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## Step 1: Publish the experiments
When you are satisfied with the experiment configuration, select the blue _Publish_ button. This saves all configurations to Statsig. To verify the changes were stored successfully, select the `...` menu and choose _Go to Experiment Console_.
Publishing changes doesn't start any experiments; it does the following:
- Sync any unsaved changes to Statsig (making them accessible in *Console* where you can configure metrics and other targeting conditions if applicable).
- Include any configured tests in the Sidecar script installed on your website.
- Allow you to QA experiments on your site while they're in an unstarted state.
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The experiment console lets you configure targeting, metrics, and advanced statistical settings.
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## Step 2: Preview and QA the experiment
At this point, your experiment is in a pre-started state, meaning it isn't yet active to site visitors.
To preview a specific variant, pass a query string to your test page URL using the `overrideuser` parameter.
The override method uses the following convention to force a test & test group:
`https://www.DOMAIN.com/?overrideuser=_`
The image below shows where to find the experiment ID and each variation ID. Based on this example, force a preview of the Test Group by visiting:
`https://www.DOMAIN.com/?overrideuser=name_color_test_1`
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This works best with the default test/control group names. If you change a group name, you must also update it in the Statsig Console by selecting "Manage Overrides".
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## Step 3: Start the experiment
Refresh the page in your browser with the script embedded. Sidecar automatically detects the published experiment and displays all experiment properties.
Start the experiment by selecting the `...` menu and choosing _Start Experiment_. Sidecar then starts the experiment, serves the correct variants for control and test groups, and begins collecting metrics.
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You have successfully built and shipped an experiment.