How and where do I look for to view "Work Description" field value?

[vimala .n]

By default, JIRA should automatically copy the contents of your Comments to the Workflow Description. In doing so, the work log will be visible to members of the project role or group selected in the padlock icon dropdown.

If this is not happening and you would like comments to be copied to workflow descriptions, request that your JIRA administrator enables JIRA's Copy Comments to Workflow Descriptions setting.

If this setting is disabled:

• The work log entry may be visible to anyone. If this is a concern, you need to edit this work log entry after creating it to modify its visibility.
• Copying comments to workflow descriptions must be done manually after logging work.

[Lenard Lee]

Hi Vimala,

The work description appears under the "work log" tab.

JIRA by default copies the contents of comments to the work log tab when logging some work. 

Hope this provides some explanation. 

Best regards,
Lenard