What are the links in "create a supplier" response?

Summary:

Regarding the REST API in page below, some links are received in response.

What are the links used for? Is there any document which has more information for the request and response fields?

Thanks.

Content (required):

"links": [

        {

            "rel": "self",

            "href": "https://ekwz-test.fa.us6.oraclecloud.com:443/fscmRestApi/resources/11.13.18.05/suppliers/300000006638387",

            "name": "suppliers",

            "kind": "item",

            "properties": {

                "changeIndicator": "ACED0005737200136A6176612E7574696C2E41727261794C6973747881D21D99C7619D03000149000473697A65787000000007770400000007737200116A6176612E6C616E672E496E746567657212E2A0A4F781873802000149000576616C7565787200106A6176612E6C616E672E4E756D62657286AC951D0B94E08B0200007870000000017371007E0002000000017372001B6F7261636C652E6A626F2E646F6D61696E2E4E756C6C56616C75655899C1C58DAABEEB02000149000A6D53514C54797065496478700000000C7371007E00020000000171007E00077371007E00020000000171007E000778"