What do these parameters even mean?

googleSearchUrl.js

const language = `en`,
      numResults = `100`, // 1 to 100
      personalization = `0`, // Non-personalized
      encoding = `UTF-8`,
      verbatim = `li:1`, // No auto-correct and no location
      ssl = `ssl`;

const googleSearchUrl = `https://www.google.com/search` +
      `?q=${keyword}` +
      `&hl=${language}` +
      `&num=${numResults}` +
      `&pws=${personalization}` +
      `&ie=${encoding}` +
      `&oe=${encoding}` +
      `&tbs=${verbatim}` +
      `&sa=N` + // I forget what this does
      `&gws_rd=${ssl}`;