What's the difference between $("+ p", this)) and $("p", this))?

Is there any difference between

$("+ p", this)) and $("p", this))? 

    <h1>introduction</h1>
    <p id="pp">it is a test

    <script>
        $(document).ready(function(){
            $("h1+p").hide();
            $("h1").hover(function(){
                $("+p",this).show()},
                function(){
                    $("+p",this).hide();});
        });
    </script>
Jquery javascript
Apr.26,2021

the one with the plus sign is the same level as this, and the one without the plus sign is all p 

$(this).find('p')

$(this).find('+p')

difference

EvaluF {sRules} Select the F element immediately after the E element, which must belong to the same parent as the F element.
E F {sRules} selects all F elements contained by the E element.

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