How many keywords should I use for Amazon listing?

There is a character limit while writing content and remaining within that limit you can add as many keywords you want in your product listing content.

There is no limit to using keywords in your listing content but keep in mind that there is a character limit for the title, bullet points, and description.

Amazon has no restriction for using keywords, as title, bullet points and description has character limit so staying within that limit you can use any number of keywords

The objective while selling things on Amazon is to get conversions. To generate worthwhile traffic, it’s essential that you pick the appropriate keywords. Use only keywords that are pertinent to your product listing while selecting your keywords. You can use as many keyword in your content which not exceeds the limits.
For Title you can use only 200 characters
For Bullet points there is 500 characters
for Description the character limit is 2000.
So within these limits you can use keyword as many keywords as you want.

Good question David!! Sorry to say there is no any keywords limit for use in the content like Title, Bullets Points and Description etc. You can add the keywords according to your need but just keep in mind the characters limit of Title, Bullets Points and Description.

You can use as many keywords as you can but do not exceed the character limit which is set by Amazon for the specific feature.

In Amazon, keywords are not restricted, as title, bullet points, and description all have character limits, so as long as they stay within the limit you can use as many keywords as you like.

It is OK to use as many keywords as you like in your listing content, but only up to the maximum character limit that Amazon allows you to enter in your listings.

You are not bounded to use a specific amount of keywords. You can add as many as you want to target and that are relevant to your product.

There are no limitations the more you use the keywords inside the amazon listing the better your product listing would be.

You can use unlimited keywords in content but all parts of the content have character limits like the title you can use 200 characters and within this limit, you can add your keywords.