All unit owners have voting rights. The weight of your individual vote is determined by the share value of your unit ("strata lot"). The higher the share value, the more voting rights you have. A unit owner will risk losing their voting rights if their maintenance contributions are in arrears.
While it is not compulsory for you to attend meetings, it is in your interest to attend them as the decisions made via voting at these meetings will affect you as a resident and even possibly the value of your property. For example, a motion to limit the number of complimentary carpark lots that may be assigned to each unit, if approved at a general meeting, will bind all unit owners.
There is a minimum number of persons (unit owners and proxies) who need to be present before the meeting can commence. This is called a quorum. Unit owners have a responsibility to one another to be present at meetings.
If you are unable to attend a meeting, you can in writing appoint a person to attend on your behalf i.e. a proxy, by giving the proxy written permission, using the proxy form found in the First Schedule of the Building Management and Strata Management Act (BMSMA)