Magento Defer Parsing of Javascript is one the most effective solution to help Magento websites to quickly speed up, reduce loading time and make websites more user friendly.
By deferring parsing of JavaScript till the last moment to make it be loaded after HTML and CSS, Magento sites will load faster than before and loading time is also reduced.
In addition, this Magento defer parsing of JavaScript can defer Iframes effectively to contribute about improve slow site speed problem.
When site speed is faster, it is of course that Magento website ranking is higher, that increase visibility.
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