How does sentiment analysis work?
Even though it sounds complex and futuristic, sentiment analysis isn’t difficult to understand. On a fundamental level, it’s a combination of two other emerging technologies: Natural Language Processing (NLP) and artificial intelligence (AI). NLP is a subset of AI that lets machines understand human speech, the way we actually talk. So instead of only understanding a predetermined set of rigidly expressed commands, machines can comprehend a wider range of inputs that are much less structured. It’s the difference between an automated phone system telling you to “Press 1 for technical support” versus “Tell me what you’re calling about today.” AI tools like the Watson Tone Analyzer use NLP to parse text—such as tweets, support tickets, or emails—and score it on a variety of emotions. In the case of Watson, these scores happen at both a document level (what is the overall tone of the text?) and at a sentence level so you can see exactly where those sentiments are expressed. Because text often contains more than one emotion or tone, these scores are expressed as percentages. You can see the full range of emotions present in the text ranked according to which are most dominant. And since AI is constantly learning, the results get more accurate over time as the tool analyzes a wider body of text.Why is sentiment analysis useful to my business?
There are lots of creative ways to use sentiment analysis. Some of the most common use cases include:- Performing social listening by analyzing what people are saying about your brand on social media;
- Determining the content of an email inquiry; and
- Scoring customer support tickets for intelligent triage.
How can I get started with sentiment analysis? It sounds complicated.
Okay, so you want to use sentiment analysis. How do you start? It’s actually really easy to implement sentiment analysis—given the right tools. Generally speaking, there are two big challenges with using sentiment analysis:-
- You have to get the text into the sentiment analysis platform; and
- You have to act on the results of the sentiment analysis.


