Cancer, which causes the deaths of millions of people, is an important public health problem worldwide. Despite significant advances in the diagnosis and treatment of cancer, survival rates are still insufficient in progressive cancers. Today, one of the most important reasons for not being able to reach the desired level in the fight against progressive cancer types is cancer stem cells (CSCs). The ineffectiveness of conventional therapies on CSCs has made it necessary to investigate the molecular mechanisms and signaling pathways used in the survival, drug resistance, and metastasis of CSCs. In this context, studies investigating the biology of CSCs suggest that lipid metabolism and extracellular vesicles are critical for understanding the stemness and metastasis of these cells. These studies have demonstrated that a number of molecules play a vital role in resistant to apoptosis in CSCs, including the cellular FLICE-inhibitor protein (c-FLIP), which inhibits TRAIL-induced extrinsic apoptosis. Another important output of these studies is the demonstration of the relationship of the cancer microenvironment in terms of epithelial-mesenchymal transition, which CSCs frequently use in the metastasis process. In addition, studies investigating the differences in glycosylation observed in CSCs and investigating cancer vaccines are promisng. These findings will strengthen our aresnal in the fight against cancer. In this article, we summarize current molecular studies on CSCs, an important target in novel cancer therapies.