"Google Sheets is a web-based application that enables users to create, update and modify spreadsheets and share the data online in real time." — TechTarget
>>> To create a new worksheet, access https://sheets.google.com/new
>>> Calculate number of days, months, or years between two dates
=DATEDIF(start_date; end_date; unit)DATE DIFFERENCE: Calculates the number of days, months, or years between two dates.
start_date: from date
end_date: to date
unit: DAY, MONTH, YEAR...
>>> Get value from "Price" sheet, 'N2' cell.
var cellValue = SpreadsheetApp.getActiveSpreadsheet().getSheetByName("Price").getRange('N2').getValue();
// Logger.log(cellValue);
>>> GOOGLEFINANCE function: https://spreadsheetpoint.com/googlefinance-function-guide/
>>> IMPORTHTML: Imports data from a table or list within an HTML page.
>>> CANNOT DIRECTLY insert special characters in Google Sheets, but CAN copy & paste special characters.