Google Index of 301 Redirects

I have searched the Internet for days now trying to determine what happens when an affiliate link is 301 Redirected via cPanel.  The main question is that I want to know how the Google Indexing of the Domain and link will show if it is an Amazon affiliate link. Can someone help me to understand this process? I have gone to forums and did days worth of Google Search.
Miss TechieTech BloggerAsked:
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Miss TechieTech BloggerAuthor Commented:
My main problem is that the 301 Redirect is done after running a 301 Redirect Checker with no redirects. And, I did a  I did not find it in Google Search Console or Google Search.  I completed the redirect 2 days ago.
David FavorLinux/LXD/WordPress/Hosting SavantCommented:
First, let's talk about actual URLs, rather than theoretical URLs.

Define your entire redirect chain. Every single link that gets hit. Be sure to describe how people start the chain. Likely this will be via email.

Also, very important, always start with 302s till you've tested + debugged your entire redirect chain.

301s can never be changed in browsers. For example... ->

If flarg35 should be flarg36 (typo), if you have substantial traffic, you can't just do this... ->

Instead you must do this... ->

Otherwise all visitors to your site which saw flarg35 will always see flarg35, because 301 redirects cache forever in browsers, independent of any expires headers.

You must be very careful with 30X links + SEO.
Miss TechieTech BloggerAuthor Commented:
OK.  So, once the 301 Redirect has been indexed in the Search Engine it caches in the Browser if clicked. OMG!

You must be very careful with 30X links + SEO.
 I will take note.
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David FavorLinux/LXD/WordPress/Hosting SavantCommented:
301s being indexed has nothing to do with Browser caching.

Once a visitor arrives at a source link which 301s to target link. Any subsequent visit to the source link will be cached as the target link... in Browsers... forever... You can read about this in Browsers docs.

Another way to think about this is that 301s are permanent. You can never change them for previous visitors, because you never have access to anyone's Browser cache.

Nothing to do with indexing. All about Browser caching.

This is why you must be very careful with redirection links of pages.

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Miss TechieTech BloggerAuthor Commented:
I see. Thanx.
Miss TechieTech BloggerAuthor Commented:
Miss TechieTech BloggerAuthor Commented:
Thanks so much, @Favor.  I got it!
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