The Snowflake Method refers to a method of plot development. Each plot element starts with a point. When all the major plot elements have been recorded, expand each point to a paragraph containing details of the significance of each point. Expand the paragraphs to pages and so on and so forth.
The idea of the Snowflake Method is that, you can avoid major plot issues requiring major rewrites because you already have done that work. In future you should spend less time staring at a blank page.