Fabric grain affects the drape or how the fabric will hang. After making the investment in fabric/trims/thread/patterns/etc, not to mention the time & effort to sew, cutting out the fabric on the correct grain is an essential step to getting a successful finished project.
I have used for many years a rather simple method to determine grain & place the grain line of the pattern piece... making use of fabric selvage is the key. This photo shows several examples of fabric selvage or the sides of the fabric.
New to the tutorials page is a quick & easy way to line up both fabric grain & then match the patterns grain line.
Go to Lining up Pattern on Grain Tutorial or click on the image on right to view the tutorial...