Why should eval be avoided in Bash, and what should I use instead?

Why should eval be avoided in Bash, and what should I use instead?

linux bash unix eval

unix

Inside a bash script, how to get PID from a program executed when using the eval command?

bash unix process eval pid

unix

Bash - how to avoid command "eval set --" evaluating variables

bash variables unix cmd eval

unix

Protecting arguments containing spaces from eval

linux bash shell unix eval

unix