.od matches any three-character string ending with "od", including "hod", "mod", and "nod".[hm]od matches "hod" and "mod".[^m]od matches all strings matched by .od except "mod".^[hm]od matches "hod" and "mod", but only at the beginning of the string or line.[hm]od$ matches "hod" and "mod", but only at the end of the string or line.\[.\] matches any single character surrounded by "[" and "]" since the brackets are escaped, for example: "[a]" and "[b]"./(product1|product2)$Matches:
https://my-domain.com/product1
https://my-domain.com/product2
but NOT
https://my-domain.com/product1/
https://my-domain.com/products/product1
https://my-domain.com/product3
.*\/(product1|product2)\/$Matches:
https://my-domain.com/product1/
https://my-domain.com/product2/
AND
https://my-domain.com/products/product1/
but NOT
https://my-domain.com/product1
https://my-domain.com/product2
https://my-domain.com/product3
.*\/(product1|product2)\/?$Matches:
https://my-domain.com/product1
https://my-domain.com/product2
AND
https://my-domain.com/product1
https://my-domain.com/product1/
https://my-domain.com/products/product1
https://my-domain.com/products/product1/
https://my-domain.com/product2
https://my-domain.com/product2/
https://my-domain.com/products/product2
https://my-domain.com/products/product2/
https://my-domain.com/products/details/product1
etc
but NOT
https://my-domain.com/product3
https://my-domain.com/products/product3