In one sentence, describe what the following article is about:

Being the tallest person on Earth, eating the most hot dogs, and running the fastest mile are all records that can be measured. Things that are abstract or based on opinion are not measurable. For example, being the world's "greatest cat lover" is abstract. However, "owning the world's most cat figurines" is measurable. For example, being the fastest swimmer in the world would work as a record because most people in the world understand what swimming is. If other people can't repeat your record and attempt to beat you, your record will not be accepted. You have to be able to prove that you actually broke a record. Claiming that you ate 700 marshmallows in ten minutes when you were younger isn't something that can be verified (unless you have it on tape). You'll need two witnesses (not related to you) to sign off on a form saying you successfully broke the record you attempted. Keep that in mind if you're attempting a record that is hard to replicate. Guinness World Records doesn't recognize every achievement, just those that are universally challenging. You won't get a record for leaving your TV on for 2 years straight (even if that's the longest anyone's left their TV on for) because you didn't actually have to do anything that challenging. You can't break a record for being the coolest person in the world or having the best sounding voice. Only records that are objective and measurable will be accepted. If you're putting the lives of people or animals in danger when attempting your record, your application will be rejected.
Break a record that is measurable. Break a record that is universally understandable. Make sure your record can be broken. Make sure your record is verifiable. Break a record that is adequately challenging. Make sure your record is objective. Never attempt a record that is harmful to bystanders or animals.