4aGoodCause does not have a vanity URL creation mechanism inside the platform but if you need a vanity, short URL for print materials, etc. it is something you can typically set up on your end with your webmaster. You can have your webmaster set up an automatic redirect from your domain to your page with 4aGoodCause.

Perhaps something like yourdomain.org/give.

It's not hard to do. Most web platforms have a mechanism to set up a "301 redirect".  Your webmaster should know how to do this.

There are also good link shortening services out there that can do this like Rebrandly.