Research projects can't be done without funding, one way to get that funding is through grants, these are provided by different orgs and institutions. To be able to get them, usually you have to fill an application form where you have to write why your project matters and why is it worth funding. Sometimes this process might be overwhleming that is why a roadmap can be very helpful so you can plan out the steps and what you need to do to be able to send a successfull application form.