Update README.md

README.md

@@ -6,27 +6,59 @@ This is a re-write of the Alertmanager UI in [elm-lang](http://elm-lang.org/).
 
 ### Filtering on the alerts page
 
-By default, the alerts page only shows active (not silenced) alerts. Adding a query string containing will additionally show silenced alerts.
+By default, the alerts page only shows active (not silenced) alerts. Adding a
+query string containing the following will additionally show silenced alerts.
 
 ```
 http://alertmanager/#/alerts?silenced=true
 ```
 
-Filter based on label matching are available.
-
-```
-http://alertmanager/#/alerts?filter=backend
-```
-
 The alerts page can also be filtered by the receivers for a page. Receivers are
 configured in Alertmanager's yaml configuration file.
 
 ```
-http://alertmanager/#/alerts?filter=severity%3Dwarning%2C%20owner%3Dbackend%2C%20env%3Dstaging
+http://alertmanager/#/alerts?receiver=backend
+```
+
+Filtering based on label matchers is available. They can easily be added and
+modified through the UI.
+
+```
+http://alertmanager/#/alerts?filter=%7Bseverity%3D%22warning%22%2C%20owner%3D%22backend%22%7D
 ```
 
 These filters can be used in conjunction.
 
+### Filtering on the silences page
+
+Filtering based on label matchers is available. They can easily be added and
+modified through the UI.
+
+```
+http://alertmanager/#/silences?filter=%7Bseverity%3D%22warning%22%2C%20owner%3D%22backend%22%7D
+```
+
+### Note on filtering via label matchers
+
+Filtering via label matchers follows the same syntax and semantics as Prometheus.
+
+A properly formatted filter is a set of label matchers joined by accepted
+matching operators, surrounded by curly braces:
+
+```
+{foo="bar", baz=~"quu.*"}
+```
+
+Operators include:
+
+- `=`
+- `!=`
+- `=~`
+- `!~`
+
+See the official documentation for additional information: https://prometheus.io/docs/querying/basics/#instant-vector-selectors
+
+
 ## Requirements
 
 - Go installed (https://golang.org/dl/)