You can find where to place your logo under 'Website', in 'Branding'.
To add your logo, click on the box and choose from your files. A good guide size for this logo is 420h x 620w, however, this is not a necessity! Baluu takes the exact centre of any image for the middle of the box. Logo sizes may also look slightly different on mobile, as the pages adapt to the screen size.
The logo will appear in the following places:
As a small image in the top left of your widget
On the booking confirmation page/virtual classroom
On your branded emails to customers