Mmhm could you pls expand a little more
Signature includes any symbol, made with the intent to authenticate a writing. The confirmation that a signature on a document belongs to the person who has signed it is called signature authentication. There is also electronic signature authentication in order computer users to prove their identity. <span> E-mail, SMS, and knowledge based questions are examples of electronic signatures. </span>
Vertical merger is the joining of two companies involved in different stages of related businesses.