There are many different types of bylaw offences, from parking tickets to noise complaints to having an unlicensed dog.
Many of these tickets have a “specified penalty” attached to them, which means that if you pay the set fine by the date noted, the matter is ended.
If you go to court, and plead not guilty, you will have a trial date set. There will then be a trial on the date agreed upon, commencing with the calling of witnesses, the taking of testimony under oath, cross-examination etc. If there is a conviction, the fine can be more than the specified penalty. It can be up to $10,000, or imprisonment up to 1 year, or both. However, these are maximum penalties and almost never imposed. Their existence should not deter a person charged from advancing their case if they believe there is a reason to do so.
The penalties do not result any criminal record.
Depending on the charge, however, the results can be more damaging than just the ticket. For example, the court can also order the offender to comply with the bylaw from that time onward. Where it is, for example, a noise or a licensing charge, it can subsequently result in the municipality trying to then take away a business licence on “public interest” grounds