In particular, we wanted to find out what you really feel about selfies.
So, for Safer Internet Day 2017, we spoke to a big group of 10 to 12-year-olds to see what they thought.
How many post like to post them? How many do they take before they get the perfect snap? Do they edit their pictures before putting them online?
See if you can guess what they said about social media with our quiz, and then read on to find out more about what they said.
While many websites say you shouldn't have a social media account until you are 13, we found out last year that many 10 to 12-year-olds have at least one account.
This year, the first thing they told us was that they enjoy to use it.
More than 4 in 5 said they feel happy, sociable or excited when on social media.
Many also told us they'd feel left out if they didn't have it.
A selfie is when you take a picture of yourself on a smartphone or camera
People use social media for lots of different reasons: talking with friends, sharing funny videos or posting photographs.
We wanted to know how many 10 to 12-year-olds use social media to post selfies.
Our survey revealed that many do, with more than half of everyone saying they use social media to share pictures that they've taken of themselves.
Posting selfies is also slightly more popular with girls than boys.
Of course, even if you take a selfie, not everyone posts them on social media.
But the ones that do like to do it told us it's not as simple as taking one quick photo and sharing it.
More than 4 in 5 said that if they take a picture of themselves to put on social media, it was "important" to look good.
And it can be hard to take the right photo first time.
On average, the 10 to 12-year-olds who put pictures of themselves on social media said they take about four pictures before getting the perfect snap. But about one in six take six or more pictures before they're happy with the result.
Even when they get the right picture, some still aren't happy to publish it online.
The majority said that, at least sometimes, they edit the picture too, by putting filters, effects or stickers onto it, a bit like in the picture above.
The results suggest that, for many, there is pressure to look a certain way in selfies.
One in five told us that when they look at photos of celebrities on social media, it makes them worry about how they look.
It wasn't just the group's own selfies which Newsround asked about.
Many people like to look at selfies posted by their mates too.
Half of the 10 to 12-year-olds we spoke to said looking at selfies posted by their friends makes them feel happy.
Survey conducted online by ComRes of 1,001 10 to 12-year olds in the UK between 4 and 11 January 2017
While there are always different opinions, it's clear that, to many of you, selfies - either your own or your friends' - are an important part of being on social media.
But what do you think about pictures of you that your parents share on social media? Click here to see what Newsround found out...

Shelter Cymru said evictions were at a seven-year high after analysing Ministry of Justice data on court possessions.
It comes as the number of mortgaged property repossessions in recent years has fallen.
A total of 958 social housing tenants had their homes repossessed.
Across all types of rental, nearly 2,200 householders lost their homes.
Shelter Cymru's director John Puzey said: "This year has been particularly tough for social tenants, many of whom have suffered due to changes in welfare benefits and the rising costs of living.
"We have been working with landlords to ensure that they are doing everything they can to help tenants stay afloat - but these figures show that more clearly needs to be done."
A spokesperson for the Welsh government said it had repeatedly expressed its concern about the scale, scope and speed of the UK government's welfare reform and its impact on the people of Wales.
"We are doing all we can to help mitigate these effects and are investing over Â£11m to prevent homelessness in the next financial year," a spokesman added.
"The latest official statistics show homelessness fell by 8% during April to June 2014 compared with the previous year. This is promising, however, we're determined to do more to tackle the problem."
You've been telling us exactly what you think about social media.
[NEXT_CONCEPT]
The number of social housing tenants who have had their homes repossessed has risen by 12% in the past year, a charity has said.