Now you may be thinking: Uh_oh, I've written business letters, but I've never written a business proposal. Don't fret! Proposal writing is simpler than you think. Basically, you need to introduce yourself, explain what you're proposing and why, describe any costs involved, and convince that boss or prospective client that you can be trusted to fulfill the promises you make. You can find lots of advice on the Internet and in special proposal writing packages like Proposal Kit. Starting with a proposal product like this can speed up the process by giving you pre_designed templates and lots of samples you can learn from to create your own winning proposal.
It's possible that using high quality templates in your project to give it visual interest might make your project more "engaging" for your stakeholders, giving you a competitive advantage. Templates can raise the perceived professionalism of your project: The same way that a suit might make you appear more professional when going on a job interview, the use of project templates can make your project appear more professional.