Knowledge base => Logging => Ferment logs
When you are logged in, the brew log page has an import button. This takes you to the import page which provides a template csv file. You fill out this csv file with brew and ferment details to import into the website. This will allow quick importing from your current logging methods.
Match up the style to the sub-category id defined on the import page, and this will match up the style upon importing
The site uses the BJCP 2015 categories at present
Steps 1, 2, and 3 highlighed on the import page screenshot below
A screenshot of my csv file filled out with brew and ferment details.