From Studio Knowledge Base
Each of your ecards will have their own URL. This is the permanent link of the ecard. Keep keywords in mind when you’re making the permanent link so that your ecard comes in relevant searches.
The permalink field in the card upload interface gets populated automatically once you have entered the ecard title of your ecard. The program converts the ecard title into lower case and replaces any spaces/special characters (like !,@,#) by underscores. The auto generated permalink can be changed by you at any point of time though.
Characters Allowed In A Permalink
The following characters are allowed in the permalink field: a-z, A-Z, 0-9, _
Are Permalinks Unique?
Yes, permalinks are unique. So if you have entered a permalink like this_is_my_permalink.html and you get a message: Not Available..try Again, please change it to something like this_is_my_permalink_1.html and retry.
Number Of Characters Allowed
The maximum number of characters allowed is 50 characters.