The document outlines the 21 key components that should be included in an event proposal, such as a cover page, proposal letter with event details, mission statement, team roles and responsibilities, community impact, regulations, marketing plan, theme, decor, layout, technical requirements, timeline, sponsorship agreements, legal compliance, suppliers, staging, technical team, emergency contacts, stakeholders, expense list, and financial summary. The proposal provides all essential information about planning and executing a successful event within the planned budget.