An example we can use is Damiana with a ratio of 1:3

This tells us that 1 part of solvent was used with 3 parts of Damiana to produce the extract.

Typically extracts made from FRESH plant material use equal parts of material to equal parts of solvent such as a ratio of 1:1 and extracts made from DRIED material will require more material against solvent such as a ratio of 1:4