📖 Glossary

Online booking glossary

The words you'll meet when you start taking bookings online, explained simply.

Online booking system
Software that lets customers book an appointment themselves on a web page, showing only times that are actually free and confirming the booking automatically.
Time slot
A specific start time a customer can book, generated from the business's opening hours, the service duration and the slot interval.
Double booking
When two customers book the same time. Good booking systems prevent it by checking availability at the moment of booking.
No-show
A customer who books but doesn't turn up or cancel. Calendar invites and easy cancellation help reduce no-shows.
Minimum notice
The shortest time before an appointment when it can still be booked, for example 2 hours or 1 day.
Booking window
How far into the future customers are allowed to book, for example 1 month or 3 months ahead.
Calendar invite
An email attachment (iCalendar/.ics) that adds the appointment to Google Calendar, Outlook or Apple Calendar, and removes it if the booking is cancelled.
Booking marketplace
An app that lists many businesses so consumers can discover and book them, usually charging businesses subscriptions and/or commissions.
Booking commission
A percentage of the appointment price that some booking apps charge, often on a new client's first booking.
Per-seat pricing
A pricing model where the business pays an extra monthly fee for each staff member who uses the software.
Embed code
A small piece of HTML you paste into your website to show your booking page inside it, so customers book without leaving your site.
Webhook
An automatic HTTP message sent to another system when something happens, for example a new booking, so it can be copied into a CRM or spreadsheet.