app/design/frontend/Smartwave/porto/Magento_Theme/layout/default.xml
<referenceBlock name="header.links">
<block class="MagentoFrameworkViewElementHtmlLinkCurrent" name="faq">
<arguments>
<argument name="label" xsi:type="string">FAQ</argument>
<argument name="path" xsi:type="string">faq</argument>
</arguments>
</block>
</referenceBlock>