Is Hugo alias a 301 redirect? Does it affect SEO?

We refactored our website last year. Some pages do not exist. We added aliases for old URLs in the metadata of new files.

For example:

------
title: Product Overview
summary: Learn about key components and features ...
category: reference
aliases: ['/docs/tools/overview/','/docs/tools/pr-overview/']
-------

After we refactored our website, we found our SEO ranking dropped.

Is Hugo alias a 301 redirect? Does it affect SEO?

See URL management | Hugo

The SEO question it is OT.
SEO mainly depends on the content, the meta refresh tag on non-existing pages has nothing to do with your website’s ranking.

But we are not going to discuss this further here.

Also please note that you are required to search the Docs before opening topics that already have answers as per the Requesting Help guidelines.

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