Whenever you are working on a project its always advisable that you save or back up your work at regular intervals to avoid losing anything should an error occur. The same applies when you are working on your website, or using any of the applications or software related to your website.
Here at Peters Web we carry out nightly back ups for all of our clients as part of our service. Alongside our backup service we advise that you have your own backup option just for cover. We recommend this plugin for Wordpress, simply install this plugin and you can control when and where the backup occurs.
Please don't hesitate to get in touch with us here at Peters Web should you require any more guidance on this topic. You can contact us via a support ticket (open a ticket) to our hosting department.