Get Status of Required Indexers to reindex (Reindex required)
php bin/magento indexer:status
check status for perticular indexer
php bin/magento indexer:status [indexer]
view list of all indexers
php bin/magento indexer:info
Reindex them by
bin/magento indexer:reindex [indexer]
example :
php bin/magento indexer:reindex catalog_product_price catalogrule_rule