What are the most efficient ways to improve the efficiency of Magento apps?

there are dozens of factors that can be slowing down the performance of a Magento 2 app. When asking Magento 2 developer interview questions, make sure that the candidate you are interviewing mentions at least half of or all the ideas listed below.

• Disable all the modules you are not using at the moment. 
• Enable caching. 
• Optimize application servers. 
• Move the stylesheets to the top. 
• Steer clear of using CSS expressions. 
• Rely on Magento Log as little as possible. 
• Move scripts to the bottom, delete the unused ones. 
• Optimize images.