Access to an instance of Adobe Campaign Classic
A Campaign user that has been given admin access rights
Campaign Standard allows you to import data to its repositories through packages, lists, or workflows. The best practice is to use workflow templates as this allows you to easily import data without much configuration or complexity. The basics of importing data is explained at About data import and export.
Use the Importing data documentation to see the full scale of how to import your data in Campaign Standard. This explains how to use templates, how to schedule your imports with a workflow, and more.
Campaign Classic allows you to import data to a database from text, CSV, TAB, XML, and databases. These different formats link to an associated table in the Campaign Classic database. An import is generally configured for reuse and can be scheduled that will occur automatically.
The product documentation explains importing data really well and is your best source to learn how to utilize this feature.
That documentation is here: https://docs.adobe.com/content/help/en/campaign-classic/using/getting-started/importing-and-exporting-data/importing-data.html
To automate the import of data, a workflow will need to be used, which is explained in the workflow importing data documentation.
A great video tutorial of importing profiles (recipients) can be found here: How to import profiles
NOTE: Campaign Standard can allow for realtime imports of profile data only at this time. This is accomplished with the REST API. However, it is considered best practice to utilize the bulk import tools explained above. There are limits to how many API calls that can be made per day explained under Engine Calls in the Campaign Standard product description as well as other limits.
If you have a use case that make senses to import profiles via the API, using the Campaign Standard API primer can guide you to the right documentation to learn how to use the API.
NOTE: Campaign Classic can allow for realtime imports into the product, however, this is not considered best practice as the Campaign Classic APIs are not designed to scale for a large volume of data and not all customers are going to have access to the SOAP APIs. Also keep in mind there is a limit to how many API calls that can be made per day which is explained under Engine Calls in the Campaign Classic product description document.
If you have a use case that make senses to import data via the API, using the Campaign Classic API primer can guide you to the right documentation to learn how to use the API.