If you need breadcrumbs in customer account dashboard page then follow below instructions
You need to override customer_account_index.xml layout file in your theme and add the below code.
<referenceBlock name="breadcrumbs"> <action method="addCrumb"> <argument name="crumbName" xsi:type="string">home</argument> <argument name="crumbInfo" xsi:type="array"> <item name="title" xsi:type="string">Home</item> <item name="label" xsi:type="string">Home</item> <item name="link" xsi:type="string">/</item> </argument> </action> <action method="addCrumb"> <argument name="crumbName" xsi:type="string">Account</argument> <argument name="crumbInfo" xsi:type="array"> <item name="title" xsi:type="string">Account</item> <item name="label" xsi:type="string">Account</item> </argument> </action> </referenceBlock>

