Add description to card metadata (#1)

- Add description to card metadata (d88e1073d3fbca7e1df31c42451d75309e226f53)

README.md

@@ -1,6 +1,6 @@
 ---
 title: seqeval
-emoji: 🤗 
+emoji: 🤗
 colorFrom: blue
 colorTo: red
 sdk: gradio
@@ -8,10 +8,37 @@ sdk_version: 3.0.2
 app_file: app.py
 pinned: false
 tags:
-- evaluate
-- metric
----
+  - evaluate
+  - metric
+description: >-
+  seqeval is a Python framework for sequence labeling evaluation.
+
+  seqeval can evaluate the performance of chunking tasks such as named-entity
+  recognition, part-of-speech tagging, semantic role labeling and so on.
+
+
+  This is well-tested by using the Perl script conlleval, which can be used for
+
+  measuring the performance of a system that has processed the CoNLL-2000 shared
+  task data.
+
+
+  seqeval supports following formats:
 
+  IOB1
+
+  IOB2
+
+  IOE1
+
+  IOE2
+
+  IOBES
+
+
+  See the [README.md] file at https://github.com/chakki-works/seqeval for more
+  information.
+---
 # Metric Card for seqeval
 
 ## Metric description