クライアントサイドのコードは swg.js を使用して、ウェブサイトのアカウントと Google アカウントをリンクする機会を読者に提供します。アカウントをリンクすることで、読者はウェブサイトに配置されたボタンやカスタム外部リンクを使用してさまざまなメリットを得られるようになります。
行動を促すフレーズ(クリックによる明示的なもの、または別の行動や状態の結果としての暗黙的なもの)をトリガーすると、読者は Google アカウントにログイン(またはアクティブなアカウントから選択)し、読者情報を Google アカウントに関連付ける権限をパブリッシャーに付与します。ニュース メディアはこのリクエストの一環として、読者の PPID(パブリッシャー提供の識別子)を作成します。この ID は読者の Google アカウントとともに保存され、以降の API の操作に使用されます。
権限を付与した後、読者はニュース メディアのサイトに戻されます。これで、ニュース メディアは、読者に認められた利用資格を Google に知らせることができるようになります。
(非同期)ニュース メディアは、アカウントのリンクができた各読者の Google 情報を PPID を使用して送信し、PPID の利用資格に関する Google の記録を更新します。PPID の利用資格に関する Google の記録は、失効すると削除されるため、常に最新にしておく必要があります。記録は、その記録の有効期限から 30 日後に失効し、その後完全に削除されます。
メリット
読者が購読や寄付を行っているニュース メディアのサイトに Subscription Linking が統合されている場合、読者は、そのサイトにアクセスしたときにニュース メディアのアカウントと Google アカウントをリンクできます。このような読者に対しては、Google 検索や Discover など、Google サービスでこのパブリケーションのコンテンツが表示される機会が増えます。これにより読者は、自分が購読または寄付を行っているパブリケーションのコンテンツを最大限に活用できます。読者はいつでも、ニュース メディアのアカウントと Google アカウントとのリンクを解除できます。また、ニュース メディア提供の操作で解除することもできます。
[null,null,["最終更新日 2025-08-06 UTC。"],[[["\u003cp\u003eSubscription Linking enables readers with existing subscriptions to link their accounts with their Google accounts for enhanced content access across Google products.\u003c/p\u003e\n"],["\u003cp\u003ePublishers need to implement both client-side and server-side integrations to facilitate the linking process and manage reader entitlements.\u003c/p\u003e\n"],["\u003cp\u003eThe process involves reader initiation, Google account authorization, and publisher updates to Google regarding reader entitlements using a unique publisher-provided identifier (PPID).\u003c/p\u003e\n"],["\u003cp\u003eReaders benefit from increased content visibility on Google Search and Discover, while publishers gain streamlined account management and improved user engagement.\u003c/p\u003e\n"]]],["Publishers implement Subscription Linking using client-side JavaScript and a server-side service. Readers link their publisher account to their Google Account via a call-to-action, granting permission and creating a publisher-provided identifier (PPID). Publishers then update Google with the reader's entitlements, tied to the PPID. This process enables readers to see content from their subscriptions in Google Search and Discover. Publishers benefit from a streamlined account management system and improved user engagement. Records become stale 30 days after the expiration date.\n"],null,["# The flow of information\n\n**Figure 1.** Sequence diagram for the high-level data flow of Subscription Linking process.\n\nTo implement Subscription Linking, a publisher's site must use client-side JavaScript to initiate the linking for readers, and a server-side service to manage the entitlements of readers. Both of these systems use information from the hosted webpage, your publication's Publisher Center configuration and Google Cloud service account information.\n| **Note:** For more information, see the appendix for [client-side](/news/subscribe/subscription-linking/implementation/client-side) and [server-side](/news/subscribe/subscription-linking/implementation/server-side) systems relationships,\n\nWalking through linking a subscription\n--------------------------------------\n\n1. A reader with a paying subscription or contribution entitlement comes to your website.\n2. Your client-side code uses `swg.js` to offer the reader the opportunity to link their account to their Google Account, so that they can receive the [benefits](#summary_of_reader_benefits) of the association, using a button or call-to-action that you design and place on your website.\n3. After triggering the call-to-action (either explicitly through a click, or implicitly as the result of another action or state), the reader logs in to their Google Account (or selects from those active), and grants permission to the publisher to associate reader information with their Google Account. The publisher creates a publisher-provided identifier (PPID) for the reader as part of the request, which is saved with the reader's Google Account and is used for subsequent api interactions.\n4. After granting permission, the reader is sent back to the publisher's site. The publisher can now let Google know which entitlements the reader is entitled to.\n5. (Asynchronously) Publishers will send Google information for each reader that has successfully linked their account, using their PPIDs to update Google's record of the PPID's entitlements. Google's record of a PPID's entitlement(s) must be kept fresh, as these records are deleted after becoming stale. A record becomes stale 30 days after the record's expiration date, and is subsequently purged.\n\nBenefits\n--------\n\nWhen a reader visits a publisher's site that has integrated Subscription\nLinking, and they have paid for a subscription or contribution on this site,\nthe reader can link their publisher account to their Google Account. These\nreaders are then eligible to have increased visibility on the content from\nthis publication on Google products, such as Search and Discover. This allows\nreaders to maximize their consumption of content from the publications they've\npaid for. Readers can unlink their publisher account from their Google Account\nat any time, or by a publisher-provided action.\n\n### Summary of reader benefits\n\n1. Readers search for any content, news or non-news, and see the 'From your subscriptions' list.\n2. Readers interact with Discover (either on their Android home screen, or on iOS in the Google app, Chrome, or through a home screen widget) and can see 'From your subscriptions' as a section within Discover.\n\n**Figure 2.** Screenshot of the 'From your Subscriptions' module on a search\nresults page on desktop and mobile.\n\n### Publisher benefits from a Linked Subscription\n\n- More efficient, longer-term resilient server-side setup for account management\n- Does not require creating a public OAuth IDP and entitlements endpoint, as previous versions of Account Linking required\n- Improved user engagement and retention by featuring the publication's content more distinctly within Google's search engine results pages.\n\n| **Note:** You can use Search Console to track Subscription Linking performance (clicks, impressions, and click-through rate). Follow the instructions under 'Find the full list of search appearance types supported by this report' in this [article](https://support.google.com/webmasters/answer/10268906#zippy=%2Csearch-results-performance%2Cdiscover-performance%2Cgoogle-news-performance), then filter by 'Subscribed content'."]]