Add in &quot;ads using any kind of animation&quot;, &quot;ads that slow site loading in any way&quot;, and &quot;ads that use up limited mobile bandwidth&quot; and you&#x27;d get closer.  When reading text, any kind of animation in view proves quite distracting, which likewise &quot;ruins the actual reading experience&quot;.  And ad scripts and ad servers use up bandwidth and slow down page loads.