An action button is used for editing the added URL in the tool, it also helps the user to delete the account, active or deactivation of the account. For example, if a user added his website in the tool but unfortunately URL entered is wrong,

In these cases action button help to update the URL in the tool and if the user needs to delete the project or he needs to deactivate or activate the project all these are done through action button in the checkseo tool. for understanding the further process check on help page in checkseo tool