Update index-similarity-and-scoring.md

Author: Luis Cabrera

articles/search/index-similarity-and-scoring.md

@@ -44,7 +44,7 @@ GET https://[service name].search.windows.net/indexes/[index name]/docs?scoringS
   Content-Type: application/json
   api-key: [admin or query key]  
 ```
-Using scoringStatistics will ensure that all shards in the same replica provide the same results. That said, different replicas may be slightly different from one another as they are always getting updated with the latest changes to your index. In some scenarios, you may want your users to get more consistent results during a "query session". In such scenarios, you can provide a `sessionId` as part of your queries.
+Using scoringStatistics will ensure that all shards in the same replica provide the same results. That said, different replicas may be slightly different from one another as they are always getting updated with the latest changes to your index. In some scenarios, you may want your users to get more consistent results during a "query session". In such scenarios, you can provide a `sessionId` as part of your queries. The `sessionId` is a unique string that you create to refer to a unique user session.
 
 ```http
 GET https://[service name].search.windows.net/indexes/[index name]/docs?sessionId=[string]&api-version=2019-05-06-Preview&search=[search term]