docs: Added descriptions of IAB subscription-specific settings.

      </dd>

    </dl>

  </li>

  <li><p>Enter additional information about the item, then click <strong>Save</strong>.</p>

  <li><p>Enter additional information about the item. If you're adding a

    subscription, also include

    <a href="#billing-form-add-subscription">subscription-specific details</a>.

    After you've provided this information, click <strong>Save</strong>.</p>

    <dl>

      <dt>Publishing State</dt>

      <dd>

  </figcaption>

</figure>

<h4 id="billing-form-add-subscription">

  Adding subscription details

</h4>

<p>

  When you add a subscription to a product list, you must define its billing

  period. All other settings related to subscriptions are optional. The

  following list shows each property that you can set:

</p>

<dl>

  <dt>Billing period</dt>

  <dd>

    <p>

      Sets the frequency at which a user is charged while their subscription

      is active.

    </p>

    <p>

      If the billing period for the new subscription is Seasonal, you must

      specify when the season starts and ends using the <strong>Start

      date</strong> and <strong>End date</strong> options. The subscription is

      active only between these two dates.

    </p>

    <p>

      To allow users to activate a seasonal subscription for a discounted price

      after the season begins, you can provide prorated pricing by selecting

      <strong>Add Prorated Price</strong>. In the text boxes that appear after

      you select this option, specify a discounted price for your subscription,

      as well as the first date during the season when users can activate the

      subscription for the discounted price. You can set multiple prorated

      prices for a single subscription, with each price point taking effect on

      a different start date.

    </p>

    <p class="note">

      <strong>Note:</strong> After you activate a subscription, you cannot

      change the subscription's billing period. For a seasonal subscription,

      this restriction means that you also cannot change the season's start and

      end dates. However, you can still add, change, and remove the prorated

      prices that you've associated with a seasonal subscription.

    </p>

  </dd>

  <dt>Free trial period</dt>

  <dd>

    Sets the number of days that users can access the subscription for free

    after they first activate it. The trial period must be at least 7 days.

  </dd>

  <dt>Grace period</dt>

  <dd>

    Determines the amount of time that the user can continue accessing the

    subscription after their payment is declined. If the user doesn't fix their

    payment issue after the grace period has ended, their access to the

    subscription is revoked.

  </dd>

</dl>

<p>

  To learn more about how you can manage subscriptions using the In-app Billing

  service, see the

  <a href="/google/play/billing/billing_subscriptions.html">In-app

  Subscriptions</a> guide.

</p>

<h3 id="billing-bulk-add">Adding a batch of items to a product list</h3>

<p>To add a batch of items to a product list using a CSV file, you first need to create your CSV