How to remove the advetisement option in the Plesk Top Bar

To remove the advertisement option from the Plesk, you need to edit the css\top\custom.css file.
For the Windows:
C:\Program Files\SWsoft\Plesk\admin\htdocs\skins\{SKINNAAM}\css\top\custom.css
For Linux Plesk :
/usr/local/psa/admin/htdocs/skins/{SKINNAAM}/css/top/custom.css

Comment the "topTxtBanner" in that file. After modification it will look like:
#topTxtBanner {
display: -moz-inline-box;
display: inline-block;
border-left: 1px solid #dce7ff;
background-image: url('../../images/vz_top.gif');
background-position: 9px 3px;
background-repeat: no-repeat;
padding-left: 36px;
padding-right: 7px;
text-align: left;
display: none; /** add this line **/
}

and
code:
#topTxtBanner a {
display: block;
display: none; /** add this line **/
white-space: nowrap;
}


Note: Replace the {SKINNAAM} by corresponding skin name.