The normalization tag currently has 951 questions. It describes itself very vague as
Normalization refers to transformations which aim to reduce variation of various types of data and thereby allow more consistent processing, searching, sorting, comparison, etc.
A minority of the question are correctly tagged with this tag but most other questions should be tagged with database-normalization instead.
There is another tag called normalize (84 Questions) and itself describes as
This tag has no single, established meaning at this time. In practice, it is currently being used for a number of unrelated topics. They include normalizing text, vector normalization and normalize() functions in assorted languages. For database normalization, please use [database-normalization].
How about burninating both tags?