Yes! We use an embed code on your site, so if you already have a shop on your website (e.g. a Squarespace store) you will have to add your MakeRoom store to a new page.
Please note that it will use a separate checkout, so your customers will not be able to combine MakeRoom and non-MakeRoom items in one basket.
If, however, you currently link out to another site (e.g. Etsy or Big Cartel) you can add a MakeRoom store to your site that is totally separate to the one you link out to. Just be sure to make the difference clear to your customers.