How do I import taxonomy terms This is almost 6000 rows of taxonomy terms ranging over 8 columns that i'd like to import from csv. I would like to use it for facet search. 

The CSV is located here (google_product_category).

The format is like:

# Google_Product_Taxonomy_Version: 2015-02-19
1 - Animals &amp; Pet Supplies
3237 - Animals &amp; Pet Supplies &gt; Live Animals
2 - Animals &amp; Pet Supplies &gt; Pet Supplies
3 - Animals &amp; Pet Supplies &gt; Pet Supplies &gt; Bird Supplies
7385 - Animals &amp; Pet Supplies &gt; Pet Supplies &gt; Bird Supplies &gt; Bird Cage Accessories
As popular Drupal 7 modules like Taxonomy CSV import/export and Taxonomy Manager are not ported to Drupal 8, I recommend a very simple but functional module called term_csv_tree_import.

After installing, go to /csv-tree-import and paste your taxonomies into the form. It assigns parent values from right to left, empty intermediate elements are allowed. You have to convert your CSV into the following format:

"element","subelement","subsubelement"