Verification is checking to see if the provided information is correct. i.e. a username input is an actual username instead of just a random string input.

Validation is checking to see if the provided information is valid. i.e. of the correct format. So making sure a username string input is a string instead of injected javascript.

Verification : Verification is a process where we more focus on checking documents, design, code and program which ensures the specification is clear to move a head to develop a right product.

Validation : Here we usually test the actual product where we ensure that the product is developed according to the documentation which we earlier verified and certifies that this software will be accepted by end user or not.

EX:

Verification: Doc says we will get output for 1+1 = 2 verified in doc, logic accepted. Validation: Are we getting correct output for 1+1= 3 Yes or Not

Validation answers the question that: "Do we do the right thing?"

Verification answers the question that: "Do we do the thing right?"