Both Drush and Console have built-in help. If you type drush, you will get a long list of available commands. If you type drupal, again you will get a long list of available console commands.

There are various ways you can add blocks to regions in pages in Drupal. You could add it in the block interface, use Panels or Context. But what if you just want to place a block directly in a Twig template?

Using partial Twig templates is a great way to organise your frontend code because you can reuse code fragments in multiple templates.

You have a piece of HTML code that needs to be included in multiple Twig templates. The code will be consistent across all of them - if you need to change it, you need to change it everywhere it is used.