亞馬遜已經悄悄地將產品詳情頁后臺關鍵詞的最大可索引字符數改為250個。

據悉，此前賣家一般可添加5000個字符。而根據亞馬遜發送給賣家的郵件顯示，將產品詳情頁后臺關鍵詞的最大可索引字符數改為250個，放置順序并不重要，可以是隨機的。

以下是亞馬遜support部門向客戶發送的郵件原文：

Dear Seller,

Thank you for writing back to us and letting us know that the issue has been fixed when the keywords are shortened to no more than 250 characters.

Please be informed that I have contacted our concerned team and received a response stating that as the Search team is constantly working to improve the relevance of search results for our customers. This help our sellers too, since we can remove non-relevant products and let sellers compete with smaller result sets of only relevant items.

Our concerned team is running a project on this to help optimize our approach, and have not yet finalized any communication, but that is still in progress.

As of now this is working as designed, the system ignores any generic keywords over 250 bytes for all the categories including health and personal and beauty. In addition, we were also informed that our system do not do partial matching of Generic Keywords fields and it is unlikely that anyone will search for paragraphs of keywords in their entirety.

AS per the help seller can put 1000 characters but our system can index only 250 characters at maximum.

Please know that we currently do not have an option of indexing the keywords to more than 250 characters. I apologize if this policy doesn’t meet your business needs.

I do understand that this may help you for better buyer experience. However, at this time, this feature is not available for our sellers.

As to make sure that you are heard, I have passed your message to the Business team as a feedback, so they are aware of your interest.

As we continue to improve both our platform and our service, input from Sellers like you is valuable. I truly appreciate your suggestion as this is a great input for Amazon to work upon and this can actually be of great help to Sellers as well as Buyers.

If there are changes pertaining to this, Sellers will be notified via Seller Central. We encourage you to keep checking, as functionality is often refined over time.

We strive to make your selling experience on Amazon as eventful as possible and therefore we are willing to extend any help that you may need at any time.

I personally wish I was able to do a lot more in this regard however, as the Policies are determined by our Business team we at Seller Support would not be able to influence those decisions.

We wish you great success in your future endeavors. Have a wonderful day!

250個索引字符限制對賣家來說意味著什么？

以上郵件內容表明，亞馬遜將只索引產品詳情頁后臺關鍵詞的前250個字符。這適用于所有五個搜索關鍵詞欄（search term field），而這項改變最大的意義在于：

1、通用關鍵詞將被規范化，這意味著相同關鍵詞不應以大小寫、單復數的形式重復添加。

2、賣家不需要添加已經在標題、產品說明和主題關鍵詞中已經出現的關鍵詞。

3、不管是哪個類別，亞馬遜的系統會自動忽略超過250個字符的任何通用關鍵詞。

4、亞馬遜還將停止對通用關鍵詞字段進行部分匹配（partial matching），因為它認為沒有人會搜索一大段的關鍵詞。

這意味著亞馬遜的第三方賣家需要非常了解他們在產品詳情頁中使用的關鍵詞。解釋一下，250個字符大約是40個字，這不是很多。因此，為了在自然搜索中脫穎而出，關鍵詞研究和優化將比以往任何時候都更加重要。

如何知道你的產品是否能被特定關鍵詞索引？

有幾種方法可以查看你的產品或競爭對手的產品是否能被特定關鍵詞索引到。這個過程被稱為反向ASIN查詢，第一種方法需要靠手動。

1、手動反向ASIN查詢

首先，如果你不知道一個產品的ASIN，請轉到產品的詳情頁。登陸這個頁面后，可以在URL中找到10位數的ASIN。以下蘋果切片器（apple slicer）的這個例子，它的ASIN是B00XTCERLE。

現在，轉到搜索欄并粘貼你的ASIN，然后添加一個“+”，再添加一個關鍵詞來檢查該產品是否被索引。比如，如果我想知道這個蘋果切片器是否能被關鍵詞“slicer”索引，你只需將“B00XTCERLE + slicer”放入搜索欄，然后按Enter鍵即可。如果該ASIN被這個關鍵詞索引了，則該產品就會在搜索結果頁面上顯示，如果沒有被索引，比如我搜索B00XTCERLE + manzana，搜索結果頁面就會顯示：“你的搜索‘B00XTCERLE + manzana’沒有匹配任何產品。”

你可以對亞馬遜上的任何產品使用這種反向ASIN查詢的方法。但這是一個檢查產品是否能被關鍵詞索引的手動辦法，但它不會給你提供任何新關鍵詞。

2、使用工具來進行反向ASIN查詢

如果你想從反向ASIN查詢過程中得到更多信息，那么你可以使用Scope Google Chrome（谷歌瀏覽器）的擴展程序。（https://www.sellerlabs.com/scope/）【點擊免費試用SellerLabs】一旦你添加了擴展程序并注冊了計劃（該工具提供了一個免費計劃，每個ASIN可以顯示三個關鍵詞），你就可以開始研究了。

首先，轉到要研究的亞馬遜產品詳情頁，然后選擇頁面右下角的“Show Scope”。以蘋果切片器為例，從上圖可以看到，Scope為這個蘋果切片器展示了217個各種長尾格式的關鍵詞。你可以根據關鍵詞、最后一次刷新時間、搜索量、每次點擊出價、搜索排名和估計的銷售量查看結果。我們可以把重點放在搜索量這個結果上，因為我們都想知道大多數購物者使用的搜索關鍵詞。然后，我們可以將關鍵詞導出到.csv文件中，刪除任何重復的內容。

此過程可以展示你或你的競爭對手的關鍵詞排名，它也可以幫助你開始優化后臺關鍵詞。

這是個好消息還是壞消息？

這一更新對賣家、購物者和亞馬遜來說是積極的一步。為什么這么說？ 因為這意味著亞馬遜搜索將產生更多相關的結果。賣家面臨的最大挑戰是，他們必須花更多時間優化自然和付費搜索的關鍵詞。結果應該會是：更低的展示次數、但有更高的轉化次數，因為購物者看到的是更加相關的搜索結果頁面。（編譯/雨果網 康杰煒）