Use the `&` operator: `=A1&B1`
Add a space between values: `=A1&” “&B1`
Use `CONCAT`: `=CONCAT(A1,B1)`
Use `TEXTJOIN`: `=TEXTJOIN(” “,TRUE,A1,B1)`
Use `CONCATENATE`: `=CONCATENATE(A1,B1)`
Fill the formula down for the remaining rows
Copy the results and paste as values if needed