Beware of the web
There are many websites and online forums giving misleading (and even dangerous) advice. Consider the source of any information you read and check how robust their references are. Vets are always happy to signpost safe, reputable websites.
Remember, common things are common! Don’t panic if an internet search of your cat’s symptoms lists serious, rare conditions. Most cats visit the vet’s with straightforward, treatable problems. Vets are aware of the more complicated conditions and know when to refer your cat for more specialised care.