How to Merge Tags in Wordpress

1. Click 'Plugins' on the left side of the dashboard menu on your WordPress website, then click 'Add New.' This displays a search interface.
2. Type 'Term Management Tools' in the search interface, then press 'Enter.' You should see the Term Management Tools first on the list of search results.

3. Click 'Install Now' under 'Term Management Tools,' then click 'OK' and 'Activate Plugin.'
4. Click 'Posts' on the left side of the dashboard interface, then click 'Post Tags.'
5. Click the check box next to each tag that you would like to merge together.
6. Click the 'Bulk Actions' drop-down menu, then click 'Merge.' A new text field labeled 'Into:' appears.
7. Click the text field, then type the name of the new or existing tag that will contain the tags that you have selected.
8. Click 'Apply.'