diff --git a/docs/concepts/syncs.md b/docs/concepts/syncs.md
index bce6891e9..bef0dc036 100644
--- a/docs/concepts/syncs.md
+++ b/docs/concepts/syncs.md
@@ -97,10 +97,24 @@ flagd start --uri azblob://my-container/my-flags.json
 
 In this example, assuming the environment variable AZURE_STORAGE_ACCOUNT is set to `myaccount`, and other options are not set, the service URL will be:
 `https://myaccount.blob.core.windows.net/my-container/my-flags.json`.
-This is expected be a valid service URL accessible by flagd (either by being public or together with environment variable credentials).
+This is expected to be a valid service URL accessible by flagd (either by being public or together with environment variable credentials).
 The polling interval can be configured.
 See [sync source](../reference/sync-configuration.md#source-configuration) configuration for details.
 
+### S3 sync
+
+The S3 sync provider fetches flags from an S3 bucket and periodically polls for flag definition updates.
+It uses [AWS standardized credentials chain](https://docs.aws.amazon.com/sdkref/latest/guide/standardized-credentials.html) to authorize the calls to AWS.
+
+```shell
+flagd start --uri s3://my-bucket/my-flags.json
+```
+
+In this example, `s3://my-bucket/my-flags.json` is expected to be a valid URI accessible by flagd
+(either by being public or together with the appropriate credentials read from a file or via the environment as described in the AWS docs linked above).
+The polling interval is configurable.
+See [sync source](../reference/sync-configuration.md#source-configuration) for details.
+
 ## Merging
 
 Flagd can be configured to read from multiple sources at once, when this is the case flagd will merge all flag definition into a single