String metric

String metric is a way to measure how much two strings are alike. For example, if you had two strings like "blue" and "blew" they might be very different, but they would still be similar. With a string metric, you could measure how similar they are. String metrics can be used to compare two pieces of text, check spelling mistakes, find the most similar words, or compare datasets. String metrics might even be used to help search engines understand what you are looking for when you type in a query.