Rotasi materi iklan

Gunakan Penyimpanan Bersama untuk menentukan materi iklan yang dilihat pengguna di seluruh situs.

Shared Storage API adalah proposal Privacy Sandbox untuk penyimpanan lintas situs tujuan umum, yang mendukung banyak kemungkinan kasus penggunaan. Salah satu contohnya adalah rotasi materi iklan, yang tersedia untuk diuji di Chrome 104.0.5086.0 dan yang lebih baru.

Dengan rotasi materi iklan, Anda dapat menyimpan data, seperti ID materi iklan, jumlah tayangan, dan interaksi pengguna, untuk menentukan materi iklan yang dilihat pengguna di berbagai situs.

Jalankan worklet Penyimpanan Bersama untuk memilih URL dari daftar yang disediakan, berdasarkan data yang disimpan, lalu render materi iklan tersebut dalam bingkai berpagar. Iklan ini dapat digunakan untuk memilih iklan baru atau konten lainnya.

Mencoba rotasi materi iklan

Untuk bereksperimen dengan rotasi materi iklan dengan Penyimpanan Bersama, pastikan Anda menggunakan Chrome 104.0.5086.0 atau yang lebih baru. Aktifkan semua API Privasi iklan di bagian chrome://settings/adPrivacy.

Anda juga dapat mengaktifkan Penyimpanan Bersama dengan tanda --enable-features=PrivacySandboxAdsAPIsOverride,OverridePrivacySandboxSettingsLocalTesting,SharedStorageAPI,FencedFrames di command line.

Bereksperimen dengan contoh kode

Pengiklan atau produsen konten mungkin ingin menerapkan strategi yang berbeda ke kampanye, dan memutar konten atau materi iklan untuk meningkatkan efektivitas. Penyimpanan bersama dapat digunakan untuk menjalankan berbagai strategi rotasi, seperti rotasi berurutan dan rotasi yang didistribusikan secara merata, di berbagai situs.

Dalam contoh ini:

  • creative-rotation.js disematkan dalam bingkai. Skrip ini menetapkan iklan mana yang paling penting ( bobot), dan memanggil worklet untuk menentukan konten mana yang harus ditampilkan.
  • creative-rotation-worklet.js adalah worklet penyimpanan bersama yang menentukan distribusi berbobot untuk konten dan hasil yang harus ditampilkan.

creative-rotation.js

// Ad config with the URL of the content, a probability weight for rotation, and the clickthrough rate.
const DEMO_CONTENT_CONFIG = [
  {
    url: 'https://your-server.example/contents/content-1.html',
    weight: 0.7,
  },
  {
    url: 'https://your-server.example/contents/content-2.html',
    weight: 0.2,
  },
  {
    url: 'https://your-server.example/contents/content-3.html',
    weight: 0.1,
  },
];

// Set the mode to sequential and set the starting index to 0.
async function seedStorage() {
  await window.sharedStorage.set('content-rotation-mode', 'sequential', {
    ignoreIfPresent: true,
  });

  await window.sharedStorage.set('content-rotation-index', 0, {
    ignoreIfPresent: true,
  });
}

async function injectAd() {
  // Load the worklet module
  await window.sharedStorage.worklet.addModule('creative-rotation-worklet.js');

  // Initially set the storage to sequential mode for the demo
  seedStorage();

  // Run the URL selection operation to determine the next content rendered.
  const urls = DEMO_CONTENT_CONFIG.map(({ url }) => ({ url }));
  const fencedFrameConfig = await window.sharedStorage.selectURL('content-rotation', urls, {
    data: DEMO_CONTENT_CONFIG,
    resolveToConfig: true
  });

  // Render the opaque URL into a fenced frame
  document.getElementById('content-slot').config = fencedFrameConfig;
}

injectAd();

creative-rotation-worklet.js

class SelectURLOperation {
  async run(urls, data) {
    // Read the rotation mode from Shared Storage
    const rotationMode = await sharedStorage.get('content-rotation-mode');

    // Generate a random number to be used for rotation
    const randomNumber = Math.random();

    let index;

    switch (rotationMode) {
      /**
       * Sequential rotation
       * - Rotates the contents in order
       * - Example: A -> B -> C -> A ...
       */
      case 'sequential':
        const currentIndex = await sharedStorage.get('creative-rotation-index');
        index = parseInt(currentIndex, 10);
        const nextIndex = (index + 1) % urls.length;

        await sharedStorage.set('content-rotation-index', nextIndex);
        break;

      /**
       * Weighted rotation
       * - Rotates the contentswith weighted probability
       * - Example: A=70% / B=20% / C=10%
       */
      case 'weighted-distribution':
        
        // Sum the weights cumulatively, and find the first URL where the
        // sum exceeds the random number. The array is sorted in
        // descending order first.
        let weightSum = 0;
        const { url } = data
          .sort((a, b) => b.weight - a.weight)
          .find(({ weight }) => {
            weightSum += weight;
            return weightSum > randomNumber;
          });

        index = urls.indexOf(url);
        break;

      default:
        index = 0;
    }
    return index;
  }
}

register('content-rotation', SelectURLOperation);

Use cases

These are only some of the possible use cases for Shared Storage. We'll continue to add examples as we receive feedback and discover new use cases.

Content selection

Select and display different content on different websites in fenced frames based on information collected in Shared Storage. The output gate for these use cases is URL selection.

  • Creative rotation: Store data, such as creative ID, view counts, and user interaction, to determine which creative users' see across different sites.
  • A/B testing: You can assign a user to an experiment group, then store that group in Shared Storage to be accessed cross-site.
  • Custom user experiences: Share custom content and calls-to-action based on a user's registration status or other user states

Generate summary reports

Collect information with Shared Storage and generate a noisy, aggregated summary report. The output gate for these use cases is the Private Aggregation API.

  • Unique reach measurement: Many content producers and advertisers want to know how many unique people saw their content. Use Shared Storage to record the first time a user saw your ad, embedded video, or publication, and prevent duplicative counting of that same user on different sites. You can then use the Private Aggregation API to output a summary report for your reach.
  • Demographics measurement: Content producers often want to understand the demographics of their audience. You can use Shared Storage to record user demographic data in a context where you have it, such as your first-party site, and use aggregated reporting to report on it across many other sites, such as embedded content.
  • K+ frequency measurement: Sometimes described as "effective frequency," there is often a minimum number views before a user will recognize or recall certain content (often in the context of advertisement views). You can use Shared Storage to build reports of unique users that have seen a piece of content at least K number of times.

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