[null,null,["上次更新時間:2025-08-28 (世界標準時間)。"],[],[],null,["\u003cbr /\u003e\n\n| **Note:** Firebase Dynamic Links is *deprecated* and should not be used in new projects. The service will be shutting down soon. Follow the [migration guide](/support/dynamic-links-faq#how_should_i_migrate_from_the_service) and see the [Dynamic Links Deprecation FAQ](/support/dynamic-links-faq) for more information.\n\nYou can improve the way apps and sites display your Dynamic Links by specifying\nsocial metadata when you [create your Dynamic Links](/docs/dynamic-links/create-links).\nThis metadata is passed on to supported services in the form of social meta\ntags, which the services use to generate a rich presentation of the link.\n\nFor example, social apps can use the metadata to present shared Dynamic Links as\ncards with a title, a description of the linked content, and a preview image.\n\nAlso, the app preview page that is displayed when you open a Dynamic Link on iOS will\nuse the metadata, if provided, to display a preview of the link's content.\n\nSocial sharing previews\n\nSocial apps can use the data specified by social metadata to generate rich\npreviews of shared Dynamic Links. For example:\n\nThe above example is a preview of a Dynamic Link with the following metadata\nspecified:\n\n- Title (`st`): Reticulated Giraffes\n\n- Description (`sd`): The reticulated giraffe, also known as the Somali giraffe,\n is a subspecies of giraffe native to the Horn of Africa.\n\n- Image (`si`): (URL to image)\n\n The image should be at least 300x200 px, and less than 300 KB.\n\nSocial metadata is passed to Twitter, Facebook, Facebook Messenger, iMessage,\nWhatsApp, Google+, and other services.\n\nApp preview pages\n\nWhen a user opens a Dynamic Link on iOS, they will see an app preview page\nthat shows them which app will be used to open the link. The app preview page\nmore reliably sends users to the most appropriate destination (such as your app)\nby minimizing unnecessary system dialogs and enabling users to navigate out of\nin-app browsers. As a result, the app preview page increases the\nclick-to-install rate of your Dynamic Links.\n\nThe app preview page also enables Dynamic Links to be received as unique matches on\niOS. When a user selects **Save my place in the app** and then clicks **Open** ,\nthe Dynamic Link is copied to the iOS clipboard; then, when your app opens, the\nDynamic Links SDK an receive the link with 100% confidence that the app's current\nuser is the user who clicked the link.\n\nIf you don't specify social metadata in your Dynamic Link, the app preview page\ndisplays your app's name, icon, and description, based on your app's information\nin the App Store. For example:\n\nWhen you provide social metadata in your Dynamic Link, the app preview page displays\nthe title, description, and image you specified instead, as well as your app's\nname and icon. For example:\n\nYou can bypass the app preview page by specifying the dynamic link parameter\n`efr=1`. Note that without the app preview page, Dynamic Links cannot be received as\nunique matches on iOS."]]