uriのクエリパラメータを見やすくしたいときなど
require 'uri' URI.decode_www_form("?q=ruby+uri+decode_www_form&sca_esv=717f11d1955b1b6b&sca_upv=1&sxsrf=ADLYWIIP0X3gIeEhSe4IYlXHhXTthW6LHQ%3A1717626943986&ei=P-hgZqH1O7PAvr0Po5COoA8&ved=0ahUKEwjhkOn-wsWGAxUzoK8BHSOIA_QQ4dUDCBA&uact=5&oq=ruby+uri+decode_www_form&gs_lp=Egxnd3Mtd2l6LXNlcnAiGHJ1YnkgdXJpIGRlY29kZV93d3dfZm9ybTIHECMYsAIYJzIIEAAYExgNGB4yBhAAGBMYHjIIEAAYgAQYogQyCBAAGIAEGKIESIsiUN8VWPoXcAF4AJABAJgB3QGgAbkDqgEFMS4xLjG4AQPIAQD4AQGYAgOgAuMCwgIKEAAYsAMY1gQYR5gDAIgGAZAGCpIHBTEuMS4xoAekDg&sclient=gws-wiz-serp") => [["?q", "ruby uri decode_www_form"], ["sca_esv", "717f11d1955b1b6b"], ["sca_upv", "1"], ["sxsrf", "ADLYWIIP0X3gIeEhSe4IYlXHhXTthW6LHQ:1717626943986"], ["ei", "P-hgZqH1O7PAvr0Po5COoA8"], ["ved", "0ahUKEwjhkOn-wsWGAxUzoK8BHSOIA_QQ4dUDCBA"], ["uact", "5"], ["oq", "ruby uri decode_www_form"], ["gs_lp", "Egxnd3Mtd2l6LXNlcnAiGHJ1YnkgdXJpIGRlY29kZV93d3dfZm9ybTIHECMYsAIYJzIIEAAYExgNGB4yBhAAGBMYHjIIEAAYgAQYogQyCBAAGIAEGKIESIsiUN8VWPoXcAF4AJABAJgB3QGgAbkDqgEFMS4xLjG4AQPIAQD4AQGYAgOgAuMCwgIKEAAYsAMY1gQYR5gDAIgGAZAGCpIHBTEuMS4xoAekDg"], ["sclient", "gws-wiz-serp"]]
Tips: RubyでURLのクエリパラメータをいい感じに書き換える #Ruby - Qiita
Ruby の URI.encode_www_form - chatwork-mobile