Two activities with different purposes
Follow-up
Follow-up is a specific pending action on a live opportunity. Something was promised, sent or discussed, and the next move belongs to you. It has an owner, a date and a defined outcome, and it fails visibly when it does not happen.
Nurture
Nurture is ongoing, low-frequency contact with someone who is not buying now but plausibly will. Its purpose is to be remembered and relevant when the timing changes. It rarely has a single owner, it runs for months, and it succeeds by producing a reply from someone who had gone quiet.
