learNings in HTML

There are so many things that i have learned about the HTML. I learned how to use the different tags.HTML, CSS, and XML is the most essential web standardsand the latest is the XHTML 1.0. there are also 2kinds of tags which is the stand alone tag and the container tag.
There are problems that i encounter in doing this activity like after typing my exercise, I save my exercise 1 but when I open this in my folder I can not open.
I address this challenges by editing the tags. I saw that the tags are wrong and then I save it again. After this I open again my folder and open my exercise that time my exercise can now open.
Moving on I will type the tags carefully and saftely so that I will not commit again mistakes.