When your app will be suspended on google play store, the google play support team will send you an email about the reason for suspension. Like the below image.

In that email, you will see an option for contact with the support team for appeal.

As you see in the above image, my Webview App was suspended for Webviews and Affiliate Spam policy. First, you have to click on the support policy team. After clicking that you will get a form, there you have to 

In that form, First, click on check option, And First name, last name, primary email, and package name will automatically fill up, then you have to describe why they should remove the suspension, then you have to select the first option, then click submit. see the below image.

After submitting the form, they will send you an email for confirming you that they got an appeal from you successfully.

After 3-7 days later you will get an email from them again. In that email, they will give enough information about why they did suspension and what you should do for the removal of suspension.

As you can see my app suspended for webview and affiliate policy violation, they said if you are the owner of that website, then submit the screenshot of the website domain console.

After submitting the document they will remove the suspension from your Webview App and will send you a confirmation email. 

Then you have to update the app on Google Play Console. You can see my Webview App is now live on Google Play store. They Removed the suspension.

That's it. Thank you.