Give a name to the filter, then click "Add a condition". Here you can choose between different conditions like emails from or to section which will trigger a given action.
Then on Actions, choose what you would like to happen with these emails, and click done. Don't forget to click "Save" button for changes to be saved on the server.
Here is an example with a filter which will move all emails coming from gitlab@e.email to the folder named Gitlab:

## How to use with Hide my email
Open email app in the cloud, click on settings button at the bottom.
Click "filters" on the left, then "Add a filter". Give a name to the filter, in the conditions select "Recipients", "contains", and paste you hide my email address. In Actions, select "Move to" and the folder you created for these emails.