A business proposal is any written offer from a seller to any prospective buyer. It become a key step in the complex income process. A business proposal is a written document which offers a particular products or services to a prospective buyer or purchaser. There are generally two kinds of business proposals: solicited business proposals and unsolicited proposals. A marketer should never confuse a proposal having a business plan. A proposal is written if a client sends ‘Request for Proposal’ to your marketer. Another situation is at which an entrepreneur has some products to offer to your client.