Google officially killed Flash advertising in its browser. As of September 1, 2015, any advertising that uses the technology requires the user to click it to play — it’ll otherwise remain frozen. Also, Edge, Mozilla, and others go this way and officially killed Flash advertising in its browser.
Your website is where your business resides — it’s like the headquarter of an offline company. Hence, it is important to practice good design principles to make sure your site reaches out to the maximum number of visitors and sells to as many people as possible.