Displaying product characteristics in the Bitrix announcement?

Question

CMS

Good afternoon. Please help me understand the code.
Here, the characteristics of the product in the announcement are displayed, to the right of the photo. It is necessary to display the first three. Here is the code:

<?if (!defined('B_PROLOG_INCLUDED') || B_PROLOG_INCLUDED!==true) die();?>
<table class="bxr-props-table">
  <?foreach($arParams["PREVIEW_DETAIL_PROPERTY_CODE"] as $propertyCode):
    $arProperty = $arResult["DISPLAY_PROPERTIES"][$propertyCode];
                if (!is_array($arProperty["DISPLAY_VALUE"]) && $arProperty["DISPLAY_VALUE"]) {?>
                        <tr itemprop="additionalProperty" itemscope itemtype="http://schema.org/PropertyValue">
                                <td class="bxr-props-name"><span itemprop="name"><?=$arProperty["NAME"]?></span></td>
                                <td class="bxr-props-data"><span itemprop="value"><?=$arProperty["DISPLAY_VALUE"]?></span></td>
                        </tr>
                <?} elseif (is_array($arProperty["DISPLAY_VALUE"]) && count($arProperty["DISPLAY_VALUE"] > 0)) {
                        
                        $withDesc = false;
                        foreach($arProperty["DESCRIPTION"] as $cell=>$val) {
                            if ($val) {
                                $withDesc = true;
                                break;
                            }
                        }
                        if ($withDesc) {?>
                            <tr>
                                    <td colspan="2" class="bxr-props-data bxr-props-data-group">
                                            <b><?=$arProperty["NAME"]?></b></td>
                            </tr>
                            <?foreach($arProperty["DISPLAY_VALUE"] as $cell=>$val){?>
                                    <tr itemprop="additionalProperty" itemscope itemtype="http://schema.org/PropertyValue">
                                            <td class="bxr-props-name no-bold"><span itemprop="name"><?=$arProperty["DESCRIPTION"][$cell]?></span></td>
                                            <td class="bxr-props-data"><span itemprop="value"><?=$val?></span></td>
                                    </tr>
                            <?}
                        } else {?>
                            <tr itemprop="additionalProperty" itemscope itemtype="http://schema.org/PropertyValue">
                                <td class="bxr-props-name"><span itemprop="name"><?=$arProperty["NAME"]?></span></td>
                                <td class="bxr-props-data"><span itemprop="value"><?=  implode(', ', $arProperty["DISPLAY_VALUE"])?></span></td>
                            </tr>
                        <?}
                }
            if ($arParams["HIDE_PREVIEW_PROPS_INLIST"] == 'Y'):
                unset($arResult["DISPLAY_PROPERTIES"][$propertyCode]);
            endif;
        endforeach;?>
</table>