If you are applying for a research programme (i.e. PhD, Masters by Research) then you will be asked whether you are applying to an advertised project, or proposing your own research.
If applying to an advertised project you will need to input details of the project on the page, but if you are proposing your own research, you will need to give a research summary and upload a research proposal. You can visit our application support pages for help on how to write a research proposal.