Here are some of the little details that you'll need to know to fully understand how to read guitar tablature. Be aware that some of these symbols vary, depending on who created the tablature.

Hammer Ons & Pull Offs

It's most common to see the letter h representing a hammer on, located within the tablature between the original fret, and the hammered on fret (eg. 7h9)
Similarly, the letter p is generally used to represent a pull off, also found in the same location within the tablature (eg. 9p7)

Ocassionally, you'll see the ^ symbol used for either a hammer on or pull off (eg. 9^7)

String bends

String bends are often notated several different ways in guitar tablature. Often, a b is used, followed by the fret at which the original note should be bent to. For example, 7b9 would indicate that you should bend the seventh fret until it sounds like the ninth fret. Sometimes, this target note is included in brackets, like this: 7b(9). Occasionally, the b is omitted altogether: 7(9).
An r is generally used to indicate a return of a bent note to it's unbent state. For example, 7b9r7 indicates a note on the seventh fret being bent up to the ninth fret, then returned to the seventh fret again.

Slides

Generally, a / symbol is used to notate an ascending slide, while a \ symbol is used to notate a descending slide. So, 7/9\7 indicates sliding from the seventh fret, up to the ninth fret, and back to the seventh fret. If no number precedes the slide symbol, this indicates sliding from an indiscriminate fret.

It is also not uncommon to see the letter s used to notate a slide. This is somewhat less concise, as when sliding from an indescriminate point (eg s9), it is unclear whether to slide up to the note, or down to the note.

I hope this helps all of you!!