Theming Drupal can be like working with layers of an onion. There are layers and layers and sometimes cutting through makes you cry. Besides not knowing what theme function or template file one must use (Drupal 8 helps with the knowing part with html comments) there is the big problem of global state and context, and the theme layer you're trying to use might be missing some context. The major example is that you want some block to be aware of the node on the page. (This is a problem which React.js helps deal with by passing state from parent to child component via props.)

But...

An "htaccess" file is a configuration file read and used by the Apache web server to configure settings local to your website or even just a subdirectory in the website. These are local settings as opposed to what you would configure in .conf files in Apache's conf directory.

There should be a dot in the filename: .htaccess - and so the file will often be hidden or invisible in directory listings unless you specify that hidden or system files should appear. But the file should exist in any Drupal installation in the top-most directory of Drupal (next to the README and...

SEO is a moving target. For blackhat SEOs, it's a constant back and forth cat-and-mouse game between them and Google. And the potential penalties by Google against sites employing blackhat tactics should be enough to encourage you as a site owner to focus your efforts on whitehat SEO. Drupal has a lot of tools which can help site builders format their content to be easily understood and categorized by search engines. And one of those factors which Google uses is the page's URL.

So it's important to pay attention to a few things related to URLs in your Drupal config.

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Drupal, unlike plain old blog software, gives you the ability to create custom content object types with backing storage in the database as custom tables, doing all this without requiring any programming knowledge. When you create a new custom Content Type and add fields to it, in effect, you are creating a new database table for those fields.

Drupal also gives you ways to access and query the data without writing code. The most powerful form of this is Views, which every Drupal site should install as soon as starting. In the Views UI, you can select which fields (database columns...