Origins of 'A Christmas Carol' - Why was it so influential?

https://www.bl.uk/romantics-and-victorians/articles/the-origins-of-a-christmas-carol

• Prince Albert – the newly installed husband of Queen Victoria – is popularly associated with institutionalising the British family Christmas, an institution which is still with us. It was Albert, for example, who brought from his native Germany the tannenbaum, or Christmas Tree. 1841 is the normally given as the date for this happy importation. The Christmas tree replaced the traditional British ‘yule log’ – wood designed to give winter warmth, not something to deck with pretty lights, fairies, favours and (round its base) presents. Both the tannenbaum and the Yule log (along with mistletoe) were incorporated into Christian festivity from pre-Christian pagan rituals associated with the seasonal turn of the year – the rebirth of the land and the green gods. There is no Biblical warrant for Christ’s day of birth being 25 December.
• Shortly after the arrival of the Christmas tree into the British parlour, Dickens, with A Christmas Carol, institutionalised what one could call the modern 'spirit of Christmas’. Dickens subtitled his story ‘A Ghost Story for Christmas’. The ghosts are imported from folklore and legend, not the Christian gospels.