Having made a CSS changes into files of your theme and cannot observe those changes in pub/static folder? Does not get reflected even on the frontend of the Magento 2 store? The solution is to regenerate CSS file in pub/static folder in Magento 2. With changing time, the need arises to change the layout or design, keep updating the content or might be updating product or services. However, you might face the issue of reflecting the changes on the frontend. This issue is reflected because of the failure of generating CSS file in pub/static folder in Magento 2. Thus, to provide customers with new or updated content in the frontend, you will have to regenerate CSS file in pub/static folder in Magento 2.