Product sourcing for your business is important. In some cases you can find products to use as give aways or promotional products. In other cases you can find new product lines to add to your current line. Along with finding new suppliers of your present lines.
We use drop shipping in some of our websites so if you are interested in this field you can find lots of help at these sites
We are members of this organization and are only now realizing how valuable it is in the business of Drop Shipping. My wife has made many contacts for product lines that she can sell on her Shopify stores. A great place to start.
Another great place to find products to help your business. They also have great training information. Their support people are very good.
Another up and coming drop shipping training center