Introduction - If you have any usage issues, please Google them yourself
The Levenshtein Distance between two strings a, b is the number of changes to transform one string into another. For example to transform mouse into house would take 1 (change the m to an h). If the strings are different length then either characters need to be added or removed. The total number of operations needed (inserts, deletes or changes) is the Levenshtein distance.