Redirects come in multiple types. When misused, they can cause some major problems, as even happened to me recently. Here are some warnings to watch for whenever you use redirects.

Check out my past episode and article, “Redirects and How to Use Them in Podcasting” to learn more about how redirects work and the different options there are.

(As an affiliate, I earn from qualifying purchases through some—but not all—of the following links. But I recommend things I truly believe in, regardless of earnings.)

Caution #1: 301 redirects are “permanent” and cached

In podcasting, we throw around the term “301 redirect” or “permanent redirect” often without realizing what that actually means: it is (or at least it's assumed to be) permanent!

I often use the physical mail or US Post Office metaphor when explaining redirects. Think of a permanent redirect as a “change of address” notice sent back to everyone who mails you something.

A 301 redirect is permanent and is essentially telling apps, “This thing has moved to over there. Please stop looking here and always look there instead. So don't look at me again.”

This is great when you actually made a permanent move—or at least intend for it to be permanent. Like when you permanently move homes and change your address!

But if you ever change your mind or—even worse—make a mistake in the redirect, that redirect will be followed and the old URL will stop being checked. So if you make a “/feedback” page that 301-permanently redirects somewhere else, then even if you change where “/feedback” goes, any app that previously loaded “/feedback” will bypass it altogether and go straight to the destination it has saved in its cache.

That cache is sometimes cleared, but you should assume it never will be! (However, this doesn't apply for anyone visiting your redirect for the first time.)

So if you get your 301 permanent redirect wrong and you don't fix it immediately—like within a few minutes—the best thing to do is to also redirect that incorrect destination to the correct one. And, unfortunately, that's not always possible. Thus, I recommend that, if possible, you make your redirect a 307 or 302 temporary redirect first, test it over a few days, and then change it to a 301 permanent redirect.

Caution #2: Your redirect destinations might change or disappear

Contrary to the Stanley cup craze of spring 2024, my favorite water thermos has been a Contigo Ashland Chill Autospout Water Bottle with Flip Straw, Stainless Steel Thermal Drinking Bottle,Leakproof,Grey, BLue, 590 ml (I earn from qualifying purchases through that link) that I've had since 2019. But I recently lost it—I think at a mall while my son and I were waiting for my broken-down car to be towed.

I thought I could simply re-order it for close to the original $10 price I paid, but no! That specific bottle has a new version I don't like as much, and the original bottle was listed for $