ASP.NET data link

We have different websites for buy and sell. They are managed from one database. We need to connect some websites to each other so that the data feed will be the same on these different sites. That means some sites can share the same buy and sell ads. ## Deliverables When a user createts an ad on the buy and sell market, they can choose "Do you want the ad to be viewed in nearby markets?" If they choose yes, the ad will also be shown in other web sites. We should be able to choose which web sites are linked to each other in a admin system. An admin system already exists but this funktion does not exist. All web sites are managed from the same database. All web sites exists today. They are identical but? have different logotype and are for different regions of the country. Project? flowchart will be provided.