Different studies (including from Telstra) in Australia tell us that around 80% of retail purchase related web searches being done on phones and / or tablet devices.
I see similar data for retail business websites I have where I track the type of platform from which users access the sites.
If your weskit is not mobile friendly it is probably seeing a major drop off of traffic once people experience this.
Mobile friendly means the site resizes for access from a mobile device. A mobile unfriendly site looks awful. No wonder shoppers quit and do not proceed to purchase or further enquiry.
Online retail is brutal. You have a few seconds and even that is too long for some browsers. You have to show from the opening screen that you are mobile engaged and able to serve shopper interest.
I mention this today because there are plenty of newsagents relying on websites that are not up to scratch. these websites should be taken down until they are mobile friendly.