Send Aid is a special project in Civilization VI: Gathering Storm. It becomes available during Aid Request and Military Aid Request competitions and increases the player's score for the competition by 50 points each time it is completed.
The base cost of Send Aid is 200 Production, which equates to 1 point for 4 Production (compared to gifting money to the target of the Aid Request, where each Gold awards 1 point). Even if Gold is obtained from Commercial Hub Investment instead of regular Gold income, 200 Production still converts to 60 Gold due to the 30% conversion rate, not to mention Great Merchant points. Thus, in terms of efficiently earning points, gifting is better than the Send Aid project. However, if there are multiple Aid Requests and Military Aid Requests going on at the same time, the Send Aid project is more efficient since it earns you points for all of them.