Vercel deploy hooks are unique URLs that allow you to trigger a deployment of a given branch. Once you have created a Deploy Hook, you can use it to trigger the deployment process (rebuild your app) from other applications or services.

A deploy hook URL looks something like this:

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https://api.vercel.com/v1/integrations/deploy/prj_xxxxxxxxxxxxxxxxxxxxxxxx/xxxxxxxx

Using a deploy hook with a Google Cloud Scheduler cron job can be a powerful way to automate your deployment workflow and ensure that your Vercel app is always up-to-date. Here's a brief tutorial on how to set this up:

1. First, you need to create a Vercel deploy hook. In the Vercel dashboard, select a project and go to the "Settings" tab and select "Git" from the menu. Scroll down to the "Deploy Hooks" section. Give your hook a name and choose the git branch. Once you have created the hook, you will be able to see the URL of the hook. Copy this URL and save it for later.

2. Next, you need to create a Google Cloud Scheduler job to trigger the deploy hook on a set schedule. Go to the Google Cloud Console and select "Cloud Scheduler" from the menu. Click on "Create Job" and fill out the details of the job, including the frequency and schedule for the job to run.

3. In the "Target" section of the job configuration, select "HTTP" as the target type and enter the URL of your Vercel deploy hook. Make sure to include any necessary parameters or headers in the request.

4. Save your job and wait for it to run at the scheduled time. You should see the deploy hook being triggered and your Vercel app being deployed with the latest changes.

By using a Vercel deploy hook with a Google Cloud Scheduler cron job, you can automate your deployment process and ensure that your Vercel app is always up-to-date. This can be particularly useful for blogs or other content-based websites, where you want to publish new content on a regular schedule. With this setup, you can focus on creating content and let the automation take care of the deployment process.