Search Terms are the keywords that you want your products to display for when searched. According to some third party research, these search terms are the 3rd most important factor that AMZ takes into account when determining how your products will show up in search results. While these keywords function in the same general way as keywords for any comparison shopping engine, there are a handful of rules that are unique to AMZ.
There are five fields for search terms. AMZ claims that each field can contain up to 1000 characters, We find keywords that people use to find your product or similar ones. We also try to find ones where your product can rank quickly and can have the better conversion.
* Amazon allows 1,000 to 5,000 characters max for search terms based on category, so we will provide search terms as many as we can fit in 1,000 to 4,500++ characters. We are not going to add search terms for the sake of filling the quota; we will only find the best and appropriate ones *