What is the difference between a solicited and an unsolicited proposal?

What will be an ideal response?

Answer: The most significant factor in planning any proposal is whether the intended recipient has asked you to submit a proposal. Solicited proposals are generally prepared at the request of external parties that require a product or a service, but they may also be requested by such internal sources as management or the board of directors. Unsolicited proposals are created by organizations attempting to obtain business or funding without a specific invitation from a potential client. Employees or managers who want to convince company insiders to adopt a program, a policy, or an idea may also initiate such proposals. In other words, with an unsolicited proposal, the writer makes the first move.