How would I know I need new sparks plug?

My compliance bushing replaced and how would I know my transmission on my car is slipping? 2007 honda accord 164,00 mileage
I'm a female so go easy. Lol

You just change all spark plugs after how many miles (See in your manual book).
You might think it's not necessary to change the spark plugs, but believe me. You want to change them. Spark plugs are cheap. Change the spark plugs and you will have a peaceful mind.

Change the spark plug wires as well

Is your car an automatic?
If your car is slipping, you would know. You step on the gas, the rpm spiked up but your car won't move anywhere. It moved slowly. It feels like your car has no power.

Shakes while stoped