Guys i have one question that right now my profile says i am on c category and i want to up my category to b so for that i don’t know how it works but i have done my ftp and it is more than 270Watts so does Doing ftp test and having more watts will increase my category form c to b? Or how it works? What i have to do to up my category? Please guide me it will be helpful
I posted the same link on the same question you just asked on the Zwift forum, which is probably the best place for it. 
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Actually i have checked it already but i am having difficulty to understand can you please tell me in simple words. please guide me in short and simple words if you can i will helped me alot. and Means ftp test don’t matter in categories? If i increase ftp number for example 280 to 300 so doesn’t increase my category to c to b??
You can enter races in categories higher than what Zwift says you are so it doesnt matter 
The category enforcement just stops strong riders entering lower ranked races - not the other way round.
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Zwift category enforcement uses actual results from rides in Zwift. It doesn’t use the FTP entered in your profile (which can be manually updated however you want).
zFTP - estimated FTP based on last 90 days of Zwift rides
zMAP - estimate Max Aerobic Power from last 90 days, this is similar to FTP, but measured over ~5 min durations (so will be quite a bit higher than FTP for most riders)
Zwift uses a combination of those, plus those values / kg, to pick your minimum category. You can always ride up a category (current ‘C’, you can enter ‘B’ if you want).
A 270W FTP on it’s own is pretty good, but I’m guessing one of two things is keeping you in the C race category…
- Not enough big/fast/high-effort rides in Zwift for the zFTP value to reflect your actual FTP.
- You’re a big person (~200lbs/90kg) which puts your zFTP/kg or zMAP/kg at the C level.
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Okay thanks man i got it thanks for the information
Zwift categories are based on your Functional Threshold Power (FTP) divided by your weight (w/kg). To move from Category C (2.5–3.1 w/kg) to Category B (3.2–3.9 w/kg), your FTP must be high enough relative to your weight. Just having an FTP of 270W is not enough—you need to check your watts per kilogram (FTP ÷ weight in kg). Also, Zwift upgrades your category based on your best three race performances over 90 days, not just an FTP test. To move up, race in Category B events and perform well in multiple races.