As the name implies, SWOT means:
Strengths
Weaknesses
Opportunity
Threat
These four determine the factors that may affect your brand's performance in the market.
What makes your brand better than other similar competitors?
Do you have a better business model, production method, brand image, etc., than competitors?
Think about the strengths of your brand in terms of 4Ps
Pricing advantage
Performance and features advantage
Promotion/marketing capability advantages
Distribution capacity advantages
Other strengths
Patents
Business and media connections
Financial resources
Unique business model
Small-size or big player advantage
Labor capacity, etc.
What are the weaknesses of your brand?
Awareness
Brand image
Consumer barriers
Operations, etc.
What are the things that your customers are not happy about or ask more about?
What are the main reasons people who are aware of your brand choose to buy a competitor brand?
What are the disadvantages you have that some other brands don't have?
Is there any competitor who has a better image, business model, price, distribution, etc....
Are there any new technologies that can be used by your brand?
Is there anything new that consumers demand?
Can any of your strengths or weaknesses be turned into an opportunity by a small amount of investment?
What are the resources, product features, etc. that you haven't utilized yet?
Is there any existing or emerging market segment that you haven't served yet or you can better serve?
Are there any new trends, social concerns that are bad for your brand?
Are there new competitors?
Are there competitors that are utilizing effective marketing techniques
Are there new products or substitute products or new product forms that are offered in the market?
Are there any possibilities for the increase of the cost, distribution problems or your product being obsolete?