The user wants to see one more information while searching accounts in Salesforce. Hence i customize the search result for accounts by adding required fields.
Setup > Customize > Select Object (Accounts) > Search Layouts > Search Results
Account Search Layouts > Search Results > Edit
Current Search Result Layout
Add Account Number by using Add arrow.
Override the search result columns customizations for all users: If selected, all user column customizations within your organization will be overwritten and set to the organization-wide default settings.
Custom Buttons: Click the following link to add button when we view search results.
Account Number column added to the Search Results for the account object.
Global Search > Search Result (Account Number column is displayed)