Product url in different stores

/products endpoint
1

we are integrating the veeqo using API below is the reference code

<?php extract(require('../fetch-products.php')); ?> 
<title>Products list from Veeqo example</title>

<!-- Bootstrap -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" integrity="sha384-1q8mTJOASx8j1Au+a5WDVnPi2lkFfwwEAa8hDDdjZlpLegxhjVME1fgjWPGmkzs7" crossorigin="anonymous">

<!-- Optional theme -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap-theme.min.css" integrity="sha384-fLW2N01lMqjakBkx3l/M9EahuwpSfeNvV63J5ezn3uZzapT0u7EYsXMjQV+0En5r" crossorigin="anonymous">

<!-- HTML5 shim and Respond.js for IE8 support of HTML5 elements and media queries -->
<!-- WARNING: Respond.js doesn't work if you view the page via file:// -->
<!--[if lt IE 9]>
  <script src="https://oss.maxcdn.com/html5shiv/3.7.2/html5shiv.min.js"></script>
  <script src="https://oss.maxcdn.com/respond/1.4.2/respond.min.js"></script>
<![endif]-->
Toggle navigation Veeqo Products List 
    <!-- Page Content -->
<div class="container">

    <hr>

    <!-- Title -->
    <div class="row">
        <div class="col-lg-12">
            <h3></h3>
        </div>
    </div>
    <!-- /.row -->

    <?php if($error): ?>
      <div class="alert alert-danger" role="alert"><?= $error; ?></div>
    <?php endif; ?>

    <?php foreach (array_chunk($products, 4) as $group): ?>
    <div class="row text-center">
        <?php foreach ($group as $product): ?>
        <div class="col-md-3 col-sm-6 hero-feature">
            <div class="thumbnail">
                <img src="<?= isset($product['image']) ? $product['image'] : 'http://placehold.it/800x500' ?>" alt="">
                <div class="caption">
                    <h3><?= $product['title'] ?></h3>
                    <p><?= $product['description'] ?></p>
                    <p>
                        <a href="<?= $product['buyUrl'] ?>" class="btn btn-primary">Buy Now!</a> <a href="<?= $product['infoUrl'] ?>" class="btn btn-default">More Info</a>
                    </p>
                </div>
            </div>
        </div>
        <?php endforeach; ?>
    </div>
    <!-- /.row -->
    <?php endforeach; ?>

    <hr>

    <!-- Footer -->
    <footer>
        <div class="row">
            <div class="col-lg-12">
                <p>Copyright &copy; Your Website 2014, API request took <?= $time ?>s, response size <?= $responseSize ?> bytes</p>
            </div>
        </div>
    </footer>

</div>
<!-- /.container -->

<!-- jQuery (necessary for Bootstrap's JavaScript plugins) -->
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js" integrity="sha384-0mSbJDEHialfmuBBQP6A4Qrprq5OVfW37PRR3j5ELqxss1yVqOtnepnHVP9aJ7xS" crossorigin="anonymous"></script>
    In this reference of above code provided by veeqo github can anyone explain the line Buy Now! More Info the key buyURL and infoUrl,where it is coming from or in product url which key it is refering to.Thanks in advance