/home/pedromontesi/Documentos/magento/src/vendor/magento/theme-frontend-luma/Magento_Theme/layout/default.xml
<?xml version="1.0"?>
<page xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:noNamespaceSchemaLocation="urn:magento:framework:View/Layout/etc/page_configuration.xsd">
<body>
<referenceContainer name="header.panel">
<block class="MagentoFrameworkViewElementHtmlLinks"
name="header.links"
template="Magento_Theme::html/promo.phtml"
before="-"/>
</referenceContainer>
<referenceBlock name="logo">
<arguments>
<argument name="logo_file" xsi:type="string">images/my_logo.png</argument>
<argument name="logo_width" xsi:type="number">300</argument>
<argument name="logo_height" xsi:type="number">300</argument>
<argument name="logo_alt" xsi:type="string">Logo name</argument>
</arguments>
</referenceBlock>
</body>
</page>
/home/pedromontesi/Documentos/magento/src/app/design/frontend/Avanti/innovation/Magento_Theme/templates/html/promo.phtml
<div class="promo-bar">
Ganhe R$10,00 de desconto no seu primeiro pedido. Utilize o cupom <strong>DESCONTO10</strong>
