The word "sign" is a word that can have many meanings and can also be used as a noun or a verb.
Usually it is understood as a gesture or action used to convey information or an instruction.
But at times, it can also be seen as an object, quality, or event whose presence or occurrence indicates the probable presence or occurrence of something else.
And signs recall or bring about a reaction or a response.
In the 1st reading, the great signs that Stephen worked among the people brought about a hostile and violent reaction from some men.
Somehow those men just can't see that those signs point to the working of the Holy Spirit, and they even arrested Stephen and accused him of making blasphemous statements.
In the gospel, Jesus said this to the people: You are not looking for me because you have seen the signs but because you had all the bread you wanted to eat.
So we may see a sign, we may react to it by ignoring or rejecting it, or that we want to see how we could use it for our advantage.
But let us ponder on the signs and see if God is showing or telling us something about ourselves.
When we respond to the signs from God, then we will know what God wants of us.