When you initially create your Gift of Travel page, it’s private. This means that only you can see it, it can’t be found by doing an online search in say Google or Bing
If you share your web page address with your friends and family, the page will remain private and only the people who have the web page address will be able to access it.
If you share your web page address using Facebook or another social media account, the privacy of your page will become dependent on your privacy settings on that social media account. If your social media account settings allow for your posts to be shared publicly, then search engines may index the page and it’ll become searchable through those search engines.