Tags can not be easily consolidated and merged; for example, if a feedback post has the tag “chart” and another feedback post has the tag “graph”, there is no easy way to replace the tag “graph” with the tag “chart” in the posts and delete then the former tag: you would first need to filter all the posts using the tag “graph”, add the tag “chart” to them, and then delete the tag “graph” from the Board Settings / Tags list