Sales support refers to functions that help sales representatives focus on selling and closing deals. There are two major types of sales support: helpers, which are people or functions best done by people like lead generation and product training, and tools, which are documents and software that help reps with their work like templates, calculators, and CRM systems. Providing effective sales support is crucial for a successful sales team as it allows reps to spend more time selling while administrative, research, and customer support work is handled by the support team.