What is a 'site type'?
Site types allow you to show availability for different types of site. Each site type can be allocated to Pitchup.com accommodation category/ies - for example, you might want to set up a 'Majestic caravan' categorised as caravans for hire.
Alternatively, you might have an electric camper site that also accepts motorhomes and tents - in that case, you can set up an 'Electric touring pitch' and allocate it to campers sites, motorhomes, and tent sites.
The accommodation categories determine which Pitchup.com searches your site types will show up in.