The meta keywords tag is an obsolete HTML metadata field that modern major search engines do not use as a ranking input, so it should not drive SEO work.
Meta keywords is a comma-separated list once placed in the document head. It is easy to generate and manipulate, which is why it is not a useful optimisation control for modern web search. It does not explain a topic to readers.
Practical implementation
Inventory templates before changing anything because a legacy CMS may populate this tag automatically. Treat removal as a low-risk cleanup, then put effort into titles, headings, visible copy, descriptive links and accurate structured data. Keep the change reversible and verify unrelated head metadata.
What to verify
Inspect rendered head output on representative pages and compare it with the CMS fields that feed it. After cleanup, verify canonical, title, description and robots directives still render correctly.
Common mistakes
Do not replace meta keywords with longer keyword lists in other hidden fields. Repetition is not useful content.