In some cases, i hope not to0 many, you want to get content from a static block in Magento 2. You can use the following code snippet in your block to get the static block info by identifier name.
Create a block class
<?php
namespace Experius\CodeBlogStaticBlockContent\Block\Checkoutnotice;
class Index extends \Magento\Framework\View\Element\Template
{
    protected $staticBlockRepository;
    protected $filterProvider;
    protected $storeManager;
    protected $logger;
    public function __construct(
        \Magento\Framework\View\Element\Template\Context $context,
        \Magento\Cms\Model\BlockRepository $staticBlockRepository,
        \Magento\Cms\Model\Template\FilterProvider $filterProvider,
        array $data = []
    ) {
        $this->staticBlockRepository = $staticBlockRepository;
        $this->filterProvider = $filterProvider;
        $this->storeManager = $context->getStoreManager();
        $this->logger = $context->getLogger();
        parent::__construct($context, $data);
    }
    public function getStaticBlock(){
        try {
            return $this->staticBlockRepository->getById('static-block-identifier'));
        } catch(\Exception $e){
            $this->logger->warning($e->getMessage());
        }
        return false;
    }
    public function getStaticContent(){
        $staticBlock = $this->getStaticBlock();
        if($staticBlock && $staticBlock->isActive()){
            return $this->filterProvider->getBlockFilter()->setStoreId($this->storeManager->getStore()->getId())->filter($staticBlock->getContent());
        }
        /* Optional ->setVariables(['number'=>213452345234] Usage in wysiwyfg 
{{var number}} */
        return __('Static block content not found');
    }
    public function getStaticBlockTitle(){
        if($this->getStaticBlock()){
            return $this->getStaticBlock()->getTitle();
        };
        return __('Whoops,');
    }
}
Usage in your phtml
<?php
/**
 *
 * @var $block \Experius\CodeBlogStaticBlockContent\Block\StaticBlockContent\Index
 *
 */
?>
<h1 class="page-title"><span class="base"><?php echo $block->getStaticBlockTitle(); ?></span></h1>
<div class="cms-content-important">
    <?php echo $block->getStaticContent(); ?>
</div>
