The tutorial covers three methods for writing data to InfluxDB 2.0: uploading data via the Chronograf UI, importing data directly into InfluxDB OSS using a CLI command, and using Telegraf with the Tail plugin for InfluxDB OSS and Cloud. The tutorial provides step-by-step instructions for each method, including setting up the necessary configuration files and navigating the InfluxDB interface to create buckets and import data. The author also addresses common issues and provides troubleshooting tips to help readers get started with writing data to InfluxDB 2.0.