Discovery Service Configuration
For the basic adoption of eduTEAMS Discovery Service all you need to know is the URL it uses to serve discovery requests of your SP. On how to apply the Discovery Service URL you should consult the documentation of the product you are using, in most cases Shibboleth SP documentation or SimpleSAMLphp documentation. If you want to study the discovery protocol in more details, you may read Identity Provider Discovery Service Protocol and Profile.
For most clients it does make sense to take also the more advanced features like filtering IdPs and embedded discovery to use.
Filtering IdPs
By default eduTEAMS Discovery Service lists all the eduGAIN IdPs. SP may reduce the list by Filtering IdPs.
Embedded discovery.
eduTEAMS discovery may be used as Embedded Discovery.