In Microsoft Word, hyphenation is one among the various tools for the document creation and formatting. It actually splits the word that would have stretched beyond the right margin. It can be found below ‘page layout’ in MS-Word.
Hyphenation comes up with the two basic rules which is-
 An internal dictionary of the words which shows where the hyphens need to be put.
 A set of logical formulas to let it decide. Among the discussed rules, the dictionary method is more correct and slow in the process.