Can anyone please guide me to the relevant material for the Title mentioned above?
Hi. I'm not sure I understand the question.
Are you looking to add content to demonstrations.wolfram.com or are you looking to deploy a project to the Wolfram Cloud?
i meant the latter i.e. how to deploy a demonstration project to the wolfram cloud?
Instructions for using the demonstrations project can be found on the demonstrations project webpage:
If you have any comments or suggestions for the demonstrations project team, there is a feedback button at the bottom right-hand corner of the webpage.
"demonstration project" means something specific around here. I think you mean you want to deploy something to the Cloud to show others or to show yourself.
Information on deploying codes to the cloud is available in many places. A few potentially useful links: