AGOL will automatically geocode a table of addresses (or other locational information) when the table is added to a map page. Users can drag and drop comma separated value (csv) files into an AGOL map and point features will be added based on those records.The table must have columns containing locational information; coordinates, street addresses, city, state, or zipcode. You will be prompted to select the geocoding type and to specify the columns to use for the operation.
This process does consume credits (40 credits per 1000 geocoded records) so this is not an appropriate solution for more than 4000 records.
Contact Data Services if you have a large project and we will help you find the best geocoding solution.