Asynchronous google ads versus Synchronous
I'm using google DFP. If I use synchronous ads from google, my site loads slowly as it needs to load the ad at the same time it loads the website, and if an ad takes long to respond, then the load of the page gets paused. If I use asynchronous ads, this is not a problem since the page will load wether or not ads are loaded. In other words, it makes the site load faster. The thing is, using asynchronous ads creates a div with fixed width and height no matter if there are ads displaying or not. So usually this creates a lot of blank space on my site, since not all ads position are being used.