Google has released a service for Dataset Search
It is called “Dataset Search” and allows you to search in 25+ million public data sets.
Most of the information on the site is public government databases and databases of educational institutions. The US government accounts for 2+ million.
If desired, you can add your own set using the open standard schema. org.
Using the service, you can search for large data sets for your projects. For example, photos of cars for an online store or training a neural network. , “Download Format”, “Usage Rights” and only free bases.