@babel/plugin-proposal-optional-catch-binding allows Babel to transpile code using the optional catch binding proposal. This proposal enables skipping the catch clause parameter if it's not needed. Instead of try { } catch (e) { }, you can write try { } catch { }. This plugin removes the need for unnecessary e or error variables in catch blocks, leading to cleaner, more concise code, especially when error handling is minimal or non-existent.