What features of span tag?
The span tag is used to color the Text between the span tags. e.g. <span style="color:blue">blue Text</span> Ok, you maybe will find the span tag unnecessary, but for clarity in your HTML code you should get familar with it, but you can use the div tag instead, it will actually do the same.
Here you can get more information.... https://www.w3schools.com/tags/tag_span.asp