Which conditional tag is correct to have a different style on a page
<p>I need to add an ads in a Wordpress page but I'm not able to localize it. </p>

<p>I have tried with the " is_archive " conditional tag but it shows me the ads in the page and not in the subcategory ( page ).
What is the correct conditional tag to use?The structure should be PAGE - CATEGORY - SUBCATEGORY. In the PAGE I put a shortcode ( custom menu wizard plugin ) which display a menù. This menù it's a list of subcategory.</p>

<p>If you want you can check the page ( where i put my name instead of the ads to make a test ) which is this one <a href="http://www.alesitiprova.it/acciaio-nodi/" rel="nofollow noreferrer">http://www.alesitiprova.it/acciaio-nodi/</a> ( I wrote CIAO ALESSANDRA DE ROBERTIS ).</p>

<p>But i would like to show this text by clicking on the link menu ( Altri, Pilastri e fondazioni, Pilastri e Travi ) 
If you click for example in "Altri" you open this page <a href="http://www.alesitiprova.it/category/particolari-costruttivi-dwg/acciao-nodi/altri-acciaio-nodi/" rel="nofollow noreferrer">http://www.alesitiprova.it/category/particolari-costruttivi-dwg/acciao-nodi/altri-acciaio-nodi/</a></p>

<p>In this page i would like to see "CIAO ALESSANDRA DE ROBERTIS ".</p>

<p>Can Someone help me?</p>