Wilfed Hughes offers an excellent tip
Emacs command of the day: eww-search-words, bound to M-s M-w. Do a web search for the text in the current region using the built-in browser.
— Wilfred Hughes (@_wilfredh) October 1, 2016
You can highlight a region in an Emacs buffer and invoke eww to search for the text in that region. I like it because I’m not forced out to a browser; everything stays in Emacs. The search engine is, of course, configurable. It will use whatever you have eww configured (via eww-search-prefix) to use.