# Comprehend

[Document](https://docs.aws.amazon.com/comprehend/) |

## Overview

* Uses natural language processing (NLP) to extract insights about the content of documents without the need of any special preprocessing.
* It develops insights by recognizing
  * entities: people, place
  * key phrases
  * language
  * brand
  * event
  * sentiments (positive, negative)

### Use cases

* Find documents about a subject
* Find out how customers feel about your products
  * using `DetectSentiment` operation
  * it will tell you whether customers feel positive, negative, neutral, or mixed using `Sentiment` label.
* Discover the topics that your customers are talking about

### Benefits

* fully managed = serverless
* Work greate with IAM, S3, Lambda, KMS, Kinesis Data Firehose
* Discover insights
* Differentiate your business
* Document processing
* Protect access to PII

## Features

* Language support
* Custom entities recognition
* Custom classification
* Comprehend medical