This new legislation applies to all people/ organizations/ businesses involved in processing personal data (names, email addresses, tracking, etc.) about individuals within the European Economic Area (EEA) within the context of selling goods and services – regardless of where in the world your business (and data) is based. The EEA states include the EU and Norway, Iceland, and Liechtenstein as well as (for now) the UK.
Prospecting and marketing are all the things you do to get people into the first of your sales funnel stages. Note that stages are broken into two or more steps wherever possible. A demo could be called a single stage, but in real life it involves a lot of things: contacting the customer, sending reminders, doing the demo, and then following up. Whatever your own sales stages look like, the support you need in managing them will be the same.