-`http-01` where a webserver provides a file with a certain value to prove that
-it controls a domain. Sometimes this isn't possible, either because of
-technical limitations or if the address a domain points to is not reachable
-from the public internet. For such cases, one could use the `dns-01` challenge.
-This challenge also provides a certain value, but through a DNS record on the
-authority name server of the domain, rather than over a text file.
+`http-01` where a web server provides a file with a certain content to prove
+that it controls a domain. Sometimes this isn't possible, either because of
+technical limitations or if the address of a record to is not reachable from
+the public internet. The `dns-01` challenge can be used in these cases. This
+challenge is fulfilled by creating a certain DNS record in the domain's zone.