Bonds, are an investment you can purchase where you essentially lend money to whoever issued the bond in exchange for future income in the form of interest payments. At the end of the life of the bond, you get your original investment back. The interest payments and principal (amount of your investment) are guaranteed by the company or government that issued the bonds.
Bonds are considered a less risky investment compared to stocks because the interest payments and principal are guaranteed by the issuer. Typically, “safer” bonds that are issued by the Government pay a lower interest rate, whereas “riskier” bonds issued by companies will pay a higher interest rate to compensate for the extra risk.