Braze Catalogsで、何を出し分けられるようになるのか

［1］Braze ── How catalogs and Liquid work together（保管と取り出し）
Catalogs are a data storage feature. They contain large sets of data that can be referenced in your messages for personalization. To actually reference the data, you’ll use Liquid as the templating language. In other words, catalogs is storage where the data is held, and Liquid is the language that pulls the relevant data from the storage.
── Braze公式ドキュメント「Catalogs」（2026年9月16日取得）

［2］Braze ── Catalog use cases（小売・ECの4つ）
Seasonal promotions: Import seasonal product collections and personalize messages to reflect current trends.
Localized messages: Import your physical location addresses, hours, and services, then personalize notifications based on user locations.
Back-in-stock notifications: Import product information that includes inventory quantity, then use back-in-stock notifications and Braze custom events to trigger a campaign or Canvas that sends users a notification that a product is now stocked.
Price drop notifications: Import product information that includes product prices, then use price drop notifications and Braze custom events to trigger a Canvas that sends users a notification that a product’s price dropped.
── Braze公式ドキュメント「Catalogs」（2026年9月16日取得。本文の引用は後半2つで、前半2つはよくある質問で要約して触れています）

［3］Braze ── Using catalogs（Liquidでの取り出し）
After creating a catalog, you can reference non-user data in your Braze campaigns through Liquid. You can use catalogs in all of your messaging channels, including anywhere in the drag-and-drop editor where Liquid is supported.
{% catalog_items Games 1234 %}
Get {{ items[0].title }} for just {{ items[0].price }}!
This renders as the following:
Get Tales for just 7.49!
Templating catalog items: You can also use templating to dynamically pull catalog items based on custom attributes. For example, let’s say a user has the custom attribute wishlist, which contains an array of game IDs from your catalog.
{% assign wishlist = {{custom_attribute.${wishlist}}}%}
{% catalog_items Games {{ wishlist[0] }} %}
Get {{ items[0].title }} now for {{ items[0].price }}!
── Braze公式ドキュメント「Using catalogs」（2026年9月16日取得。「Templating catalog items」の見出しと本文のあいだに、本文で使っていない手順の文があり、ここでは省いています）

［4］Braze ── Data storage limitations（容量の枠）
Data storage for catalogs is limited based on the size of the catalog items, which may be different from the sizes of uploaded CSV files.
For the free version of catalogs, the amount of storage allowed is up to 500 MB. You can have unlimited items as long as the storage space does not exceed 500 MB.
For Catalogs Pro, the storage size options are: 5 GB, 10 GB, 15 GB, or 50 GB. Note that the free version’s storage (500 MB) is included in each of these plans.
If you need to upgrade your catalog storage, contact your Braze account manager.
── Braze公式ドキュメント「Catalogs」（2026年9月16日取得。容量の区分は変わることがあります）

［5］Braze ── Create a catalog の注記（データ型と名前）
This data type cannot be edited after you set up your catalog. In addition, a NULL value isn’t supported in CSV upload and will be treated as a string.
Note that you won’t be able to edit this name after the catalog is created. You can delete a catalog and re-upload an updated version using the same catalog name.
── Braze公式ドキュメント「Create a catalog」（2026年9月16日取得。2つの注記は同じページの別の位置にあります）

［6］Braze ── Selections（定義・上限・Liquid）
Selections are groups of data that you can use to personalize a message for each user in your campaign. When you use a selection, you’re essentially setting up custom filters based on specific columns in your catalog. This could include filters for brand, size, location, date added, and more.
You can create up to 30 selections per catalog.
You can add up to 10 filters per selection.
In the Results limit section, enter the results (up to 50).
Using any Liquid in catalogs, such as custom attributes and custom events, can result in different results returned for each user in your selection.
Using a catalog with your meal delivery service’s information for the meal name, price, image, and category of the meal, you can create a selection to recommend three meals based on a user’s most recently viewed category.
── Braze公式ドキュメント「Selections」（2026年9月16日取得。6つの文は同じページの別の節から、私たちが並べたものです。定義の段落は「It gives you control over…」の1文の手前で切っています）

［7］Braze ── Catalogs の定義と、データ型の表（CSVで入る型と入らない型）
Catalogs access data from imported CSV files and API endpoints to enrich your messages, similar to how you’d access custom attributes or custom event properties through Liquid.
You can bring in any type of data into a catalog. Typically, the data is metadata about offerings, such as products, discounts, promotions, events, and similar.
Data types: String / Number / Boolean / Time / Geolocation — Available via CSV upload: Yes; Available via API and CDI: Yes.
JSON object: A nested object with key-value pairs. Can be displayed in the platform but can only be created or updated through the API or CDI. — Available via CSV upload: No.
String array: A list of strings. Can be displayed in the platform but can only be created or updated through the API or CDI. Maximum of 100 elements. — Available via CSV upload: No.
── 1〜2文目はBraze公式ドキュメント「Catalogs」、表は「Create a catalog」（いずれも2026年9月16日取得。表は7行を、CSVで入る5行と入らない2行にまとめて転記しました。各行の説明文は入らない2行だけ写しています）