Generally speaking, a helm above the shield in a coat of arms signifies that the owner of the arms is a secular gentleman or nobleman. A lady cannot display a helmet as women in chivalric society did not fight; nor can a clergyman, for the same reason - though he may display a mitre or a cardinal's hat, if appropriate. The arms of towns and institutions (companies, schools and universities, etc) don't have helms either.
In some countries specific types of helmet are reserved for different ranks of user, but this is not universal in Europe; I don't believe this is the case in Spain.
In any case, this image comes from one of the scam merchants who bamboozle people into believing they are entitled to a coat of arms just because they have the same surname as someone who really does own one. These people, who know perfectly well they are just peddling fantasies, naturally don't bother to tailor their images, they just plonk the shield into a boilerplate shield/helm/wreath arrangement.