Update README.md

README.md

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 # tinyl-shortener
-URL shortening web service developed with Flask
+URL shortening / safety checker web service 
+
+A basic URL shortener service which uses built-in modules and those which come with the Flask package.
+
+Performs validation checks against user input to prevent attacks such as SQL injection when dealing with database queries.
+
+Returns a unique path for each given URL which successfully redirects to given destination URL.
+
+Abuse preventative measures implemented which perform checks on given URL to ensure safety before redirection.
+
+
+Another service included is the ability to perform safety checks on suspicious URLs - the supplied URL is checked against different blacklist providers which returns any providers
+that have blacklisted the URL and for what reason. 
+
+DNS queries are also made against the given URL/domain to gather information such as domain creation date, location, providers - combining the returned data allows me to provide users with a background of the given site and any potential security risks associated.