How to add header logo on html ?

Question

For web please

Answer 1

favicon

Answer 2

ROCKSTYLE GAMER
If you want that small icon which will be displayed in the browser tab, then favicon(as suggested by Gordon) is what you are asking for.

You can add a favicon like this:
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<link rel="icon" href="***url goes here***" >
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Add the link element inside the head element of your HTML file.

See these:
https://stackoverflow.com/questions/4888377/how-to-add-a-browser-tab-icon-favicon-for-a-website
https://developer.mozilla.org/en-US/docs/Glossary/Favicon
https://www.w3.org/2005/10/howto-favicon

Answer 3

If you want logo then go and search google
There are many websites for making logo

If you are saying for how to adjust then use css