A CC BY license allows users to share (copy and redistribute the material in any medium or format) and adapt (remix, transform, and build upon the material) for any purposes, also commercially. However, users must attribute you (unless you have specifically said that you do not want to be attributed) and clearly indicate if changes have been made to your original work.
Additionally, CC licenses contain a ‘no endorsement, no sponsorship’ clause, which explicitly states that users may not imply that the original author supports or endorses their reuse of the work.
