To call a CMS block in a page or in another block all we have to write the below code
We can also pass the value of block in block_id.
Here we Manually add a block.Before this you have to Learn How to make CMS block Through Frontend.
What we have Done,
The widget class type is using this Magento\Cms\Block\Widget\Block by a Template file widget/static_block/default.phtml to render the actual CMS block.
CMS blocks are stored in the cms_block and cms_block_store tables in a