1.Reduce HTTP Requests( the more on-page components, the longer it takes for the page to be rendered. )
2.Minifying Files(remove unnecessary formatting, whitespace, and code. redundant code increases the page size)
3.Asynchronous Loading(This speeds up site because when browsers load a page, it moves from top to bottom)
4.Enable Compression(smaller the files, the faster website will be.Compres with Gzip)
5.Enable Browser Caching(when the visitor opens your site again, it will load faster)
6.Use a CDN(whenever browser request certain files , requests file will be directed to the closest server)