mitgehen
to go along
To accompany someone on foot; to go together with others to a specific place.
Ich gehe kurz zum Supermarkt, willst du mitgehen?
I'm just going to the supermarket, do you want to go along?

to go along
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to go along
To accompany someone on foot; to go together with others to a specific place.
Ich gehe kurz zum Supermarkt, willst du mitgehen?
I'm just going to the supermarket, do you want to go along?

'Mitgehen' (to go along) is a separable verb. The prefix 'mit-' separates from the verb in the main clause and comes at the end of the sentence. In subordinate clauses, the verb stays together.
Gehst du später mit ins Café?
Are you going along to the café later?
Since 'mitgehen' (to go along) expresses movement, the perfect tense is always formed with the auxiliary verb 'sein'. So say 'ich bin mitgegangen' (I went along), not 'ich habe mitgegangen'.
Er ist gestern Abend mit seinen Freunden ins Kino mitgegangen.
He went along to the cinema with his friends yesterday evening.
The expression 'etwas mitgehen lassen' (to make off with something) is a fixed unit and means 'stehlen' (to steal). It is used colloquially and has the structure: subject + hat + object (accusative) + mitgehen lassen.
Ich glaube, jemand hat meinen Stift mitgehen lassen.
I think someone made off with my pen.
You can recognize the figurative meaning 'zustimmen' (to agree) by the fact that the verb refers to something abstract, such as a proposal, an idea, or an argument. The literal meaning refers to a physical path or place.
Das ist ein guter Plan, da kann ich mitgehen.
That's a good plan; I can go along with that.
to follow
'folgen' and 'mitgehen' can both mean that you move with another person. 'folgen' emphasizes that someone is going or driving behind a person or thing. The other person is more likely to be in front or to be setting the direction. 'mitgehen' emphasizes that you accompany someone and walk together with them. The words are easy to confuse because in both cases two people may take the same route. If you are simply going behind someone, 'folgen' fits better; if you are out and about together, 'mitgehen' sounds more natural.

Am Wochenende gehe ich mit meiner Nachbarin zum Markt mit.
At the weekend, I'm going along with my neighbor to the market.
Im Museum folgt die Gruppe der Führerin durch die alten Räume.
In the museum, the group follows the guide through the old rooms.