What does the T mean in this tab?

[Shortfinger]

Please look at this TAB and comment on the T that appears a few times.

What am I supposed to do? I understand H and P, but the T is a mystery.

https://www.cowboylyrics.com/tabs/lo...pard-4151.html

[HHP]

Seems to indicate a tied note.Played and held for the duration.

[stanron]

At the bottom of the page you should see;

NOTES:
H = hammer on
P = pull off
T = tied note

The expression 'tied note' comes from standard notation and is used to show a note that has a length that can't be expressed with normal notes. You'll see that each T is connected to two notes, both the same. You play the first note and make it last as long as both written notes added together. Tab usually does not show timing with this much detail. You could just play the first note and forget about the second one.

[TBman]

A little more to the above which is good. Each musical measure of a song's written notation can be thought as a bucket that holds notes, in 4/4 time it would be 4 full beats. These 4 beats in a measure can be broken out into any number of note durations, as long as they don't add up to more than four beats. You can have 2 quarter notes and 4 8th notes for instance. But, these measures are not created to interfere or limit the music, just to organize it on paper. So when you really need 2 quarter notes, 3 8th notes and then another quarter note you would break that last quarter note into two 8th notes that are tied, but cross the end of the measure.

[JonPR]

As well as showing notes held across bar lines (as TBman explained), ties are also used to show notes held across the half-way point in the bar - as in the 6th and 8th bars of that tune.
In terms of the note count in each bar, those to 8ths could simply be represented by a quarter note. But that would make the rhythm harder to read (some readers of notation might even think there was a mistake).
As it is, you can see that the first note of the pair is a syncopation - played before beat 3 and held across beat 3.